Japan

Japan is an island country in East Asia. Its territory of about 378,000 square kilometres is made up of four large islands, Honshu, Hokkaido, Kyushu and Shikoku, and more than 14,000 smaller islands. About three-quarters of the land is mountainous or hilly, so most people live on narrow coastal plains, especially along the Pacific side of Honshu. Its population of about 123 million (2024) makes it one of the most populous countries in the world. Tokyo is the capital and largest city. The country is a parliamentary constitutional monarchy, and its economy is among the largest in the world, based on advanced manufacturing, services and international trade.

Japan's physical setting shapes much of its history and daily life. The archipelago sits where several tectonic plates meet, which makes it one of the most seismically and volcanically active regions on Earth, and it lies in the path of typhoons and seasonal monsoons. Its climate ranges from subtropical in Okinawa to subarctic in northern Hokkaido. Limited arable land, dense urban settlement and a rapidly aging population are central issues for the country. Japan is also important for its contributions to science, technology, literature, arts and popular culture, and it has been a major actor in regional and global affairs since the late nineteenth century.

This entry covers Japan's geography and geology, climate and ecosystems, and rivers and coasts. It then traces the country's history from early settlement through the feudal era, the Meiji modernization, the wars of the first half of the twentieth century, the postwar period and the present. Later sections address government and administrative divisions, the economy, population and society, language and education, religion, culture, science and technology, foreign relations, natural hazards, and environmental and energy challenges.

Name and etymology

In Japanese the country is written 日本 and read either Nihon or Nippon. The two characters are usually glossed as "origin of the sun," a meaning generally traced to the archipelago's position east of the Asian continent The name is thought to originate from Japan's location to the east of the Asian continent. The compound was not coined as a single unit. Scribes first recorded a native expression, hi no moto, with these Chinese characters, and only afterwards were the characters given Sino-Japanese readings The compound began as a native Japanese phrase, hi no moto, "the sun's origin", which scribes wrote with those two characters. Over time the characters were read with Sino-Japanese pronunciations instead.

Nippon and Nihon

The two readings are interchangeable in principle, but they have different registers. Nippon, the original Sino-Japanese reading of the characters, is favored today for official uses, including on banknotes and postage stamps. Nihon is typically used in everyday speech and reflects shifts in Japanese phonology during the Edo period.

The English name

The English word "Japan" does not derive from the Japanese readings directly. It reached Europe through other languages. Marco Polo recorded an island called Cipangu around 1300, and Malay and Portuguese forms followed, with the English form first appearing in print in 1577 Japan is called Japan because European traders heard a Chinese pronunciation of the country's own name, 日本. The exact route is still debated. One view links the word to Marco Polo's Cipangu, while another derives it from a Malay form based on a southern Chinese reading of Nippon Some people say that this is the origin of "Japan". Others claim that "Japan" came from Malaysian 'Jih-pun' or something similar, which came from a southern Chinese dialect reading of Nippon.

Wa and Yamato

Before the Japanese name was adopted, Chinese histories used Wa (倭) for the people of the archipelago and Wakoku (倭國) for the land Early Chinese histories call the people of the archipelago, perhaps of Kyūshū, Wa (倭), and the country Wakoku (倭國). The origin of the word is uncertain. One proposal connects the term with the Japanese first-person words waga and ware, though this remains a hypothesis. Chinese records also describe a golden seal granted to a Japanese envoy in 57 CE These records mention that Han Dynasty Emperor Guangwu gave a golden seal to the first Japanese envoy to visit China in 57 CE.

The character 倭 later became a problem. Scholars have interpreted Wō 倭 "Japanese" as connoting either "submissive; docile" or "short; dwarf". In the 8th century it was replaced with 和, which has the same reading and means "harmony" Japanese scribes replaced the pejorative Chinese character 倭 for Wa "Japan" with Wa 和 "harmony; peace". Accounts differ on who started the change, with one saying the Japanese objected and the Chinese agreed when the Japanese learned to read Chinese they complained about it, and the Chinese agreed to change it to 和. The Yamato rulers then wrote their own name as 大和 ("great harmony"), which became the native name Yamato Yamato (大和, "great harmony") is the oldest native name for "Japan". The name first described Yamato Province, near present-day Nara This name Yamato (大和) originally referred to "Yamato Province", around present-day Nara Prefecture, and it spread to the whole country as the Yamato rulers extended their control The Yamato name became synonymous with all of Japan as the Yamato rulers suppressed other clans and acquired agricultural lands.

Adoption of Nihon in diplomacy

The switch from Wakoku to Nihon is dated variously. Nippon appears in historical sources at the end of the 7th century Nippon appeared in history only at the end of the 7th century., and the Old Book of Tang records a request for the change in 703 The earliest record of this appears in the Chinese Old Book of Tang, which notes the change in 703 when Japanese envoys requested that its name be changed.. The name was formally adopted in the early 8th century, after which Yamato was used for Japan mainly in poetic contexts Nihon or Nippon, the word behind the English Japan, was officially adopted as the name of the country in the early 8th century, and use of Yamato to stand for Japan has been essentially poetic since that time.

The motive is also reported differently. Some records say that the Japanese envoy to China requested to change the name because he disliked it; other records say that the Chinese Empress Wu Zetian ordered Japan to change its name. Whether the Chinese court formally accepted the change is uncertain, since the evidence is ambiguous Given the ambiguity in the Hou Hanshu, it is unclear if the Chinese imperial agreed to the changes.

"Land of the Rising Sun"

The English epithet "Land of the Rising Sun" is a translation of the name, and it is linked to diplomacy with China. Both Nippon and Nihon literally mean "the sun's origin", that is, where the sun originates, and are often translated as the Land of the Rising Sun. This nomenclature comes from Imperial correspondence with the Chinese Sui dynasty and refers to Japan's eastern position relative to China. A 607 letter to the Sui court is often cited as an early example, beginning with "from the Emperor of the rising sun". For the Chinese court the phrase most likely meant only that Japan lay furthest east, while for the Japanese it later carried symbolic weight. Imperial mythology added to this. The ruling line claimed descent from the sun goddess Amaterasu, which connected the name to a divine origin for the throne The sun plays an important role in Japanese mythology and religion as the emperor is said to be the direct descendant of the sun goddess Amaterasu. In the West, the epithet became popular and remains a common nickname for the country It is the source of the popular Western epithet "Land of the Rising Sun".

Geography and physical setting

Japan is an island nation off the eastern edge of the Asian mainland, and the Sea of Japan separates it from the continent It lies off the eastern coast of the Asian continent and is separated by the Sea of Japan.. The archipelago runs from subarctic Hokkaido in the north to subtropical Okinawa in the south The archipelago spans from subarctic Hokkaido in the north to subtropical Okinawa in the south, resulting in varying climatic zones.. The four main islands are Hokkaido, Honshu, Shikoku and Kyushu, and Honshu is by far the largest of them. Together these four islands make up about 97 percent of the national territory the four main islands take up 97% of the country's total size, with the island of Honshu taking up the largest space.. The Ryukyu chain extends farther southwest, and Okinawa Island lies roughly 380 miles from Kyushu Okinawa Island is about 380 miles southwest of Kyushu.. The official island count depends on the survey method. A 2023 government recount using digital maps raised the total from 6,852 to 14,125 In 2023, a government recount of the islands with digital maps increased the total from 6,852 to 14,125 islands..

The total area is about 377,975 square kilometres Japan covers a total area of 377,975 square kilometers (145,937 square miles).. Government figures from 2021 split this into about 364,546 square kilometres of land and 13,430 square kilometres of water In total, as of 2021, Japan's territory is 377,973.89 km2 (145,936.53 sq mi), of which 364,546.41 km2 (140,752.16 sq mi) is land and 13,430 km2 (5,190 sq mi) is water.. Estimates of the mountainous share vary by source. One U.S. government profile gives about 73 percent About 73% of the country is mountainous, with a chain running through each of the main islands., while other sources put it above 70 percent over 70 percent of the landmass covered by rugged terrain or at almost four-fifths Almost four-fifths of Japan is covered with mountains.. The ranges are steep and dissected by deep valleys, which limits flat land and makes road and rail construction costly. The Japanese Alps run down the centre of Honshu The Japanese Alps run down the center of the largest island, Honshu.. Mount Fuji, at 3,776 metres, is the highest point Mount Fuji is the most iconic feature of this landscape, a nearly symmetrical volcanic peak that rises to 3,776 meters, making it the country's highest point. Because flat ground is scarce, farmers cultivate many hillsides up to the summits Since so little flat area exists, many hills and mountainsides are cultivated all the way to the summits..

Lowlands are concentrated in narrow coastal plains, basins and river valleys. The largest are the Kantō Plain around Tokyo and the Osaka Plain, which hold most of the population and urban centres Coastal plains, such as the Kanto Plain around Tokyo and the Osaka Plain, are home to most of Japan's population and urban centers.. Because the mountains leave little interior flat land, the major cities and metropolitan areas sit along the coast, and industry and transport follow the same pattern. No point in Japan is more than 150 kilometres from the sea It is narrow, and no point in Japan is more than 150 km (93 mi) from the sea., so coastal geography shapes even inland settlement. The two main coasts differ in character. Honshu faces the Pacific to the south and east and the Sea of Japan to the north and west Location: Sea of Japan (North and West); Pacific Ocean (South and East). The Pacific coast is more open to the ocean, while the Sea of Japan coast faces the continent and receives heavy snowfall in winter.

Japan's maritime extent is large relative to its land. Its exclusive economic zone (EEZ) covers about 4,470,000 square kilometres The Exclusive Economic Zone of Japan covers 4,470,000 km2 (1,730,000 sq mi) and is the 8th largest in the world.. Sources differ on its global ranking. One explainer places it sixth Japan's Exclusive Economic Zone is the sixth-largest worldwide and covers an approximate 4,470,000 square kilometres.. The EEZ is more than eleven times the land area, and it is extended by remote island groups Thanks to the remote outlying islands of the Nanpō and Nansei archipelagos, Japan has a large Exclusive Economic Zone. The EEZ, which extends up to 200 nautical miles from the coast, gives the state rights over marine resources. Those waters are rich in fish and hold oil and gas deposits under the seabed This area is rich in fishery resources and has significant oil and gas reserves below the seafloor.. Fisheries also depend on nutrients from the land. Fast streams from the mountains carry organic matter to the sea, feeding plankton and supporting productive coastal fishing grounds Swift flowing streams from the mountains carry organic matter from the decomposition of plants to rivers that empty into the ocean. This nourishes plankton, giving rise to the rich fishing grounds of Japan's coastal waters with their abundant seaweed and fish reserves.. Shipping benefits from the country's position beside major global trade routes the country benefits from its proximity to major global trade routes and its access to maritime resources..

Geology and tectonic origins

Japan lies at the eastern edge of the Eurasian Plate, where the Pacific Plate and the smaller Philippine Sea Plate meet it. Four plates converge in this area, and their movements drive most of the country's geology. The Pacific Plate descends beneath northern Honshu and Hokkaido at the Japan Trench, while the Philippine Sea Plate is pushed beneath central and southwestern Japan along the Sagami, Nankai and Ryukyu troughs. Published convergence rates differ. One geophysical summary gives about 80 mm per year for the Pacific Plate and 40 mm per year for the Philippine Sea Plate, whereas a later seismotectonic study gives about 9–11 cm and 6–11 cm per year. The difference reflects different measurement methods and reference frames rather than a settled disagreement about the setting itself.

The downgoing slabs carry water into the mantle, which lowers the melting point of the overlying rock. The resulting magma rises to form the island arcs that make up the archipelago along the northwestern Pacific margin. Subduction has been active for tens of millions of years, and some reconstructions place the start of Pacific subduction beneath the region around 50 million years ago, with subduction of both the Pacific and Philippine Sea plates near Japan established by the Miocene, roughly 20 to 15 million years ago.

Volcanoes, hot springs and the Ring of Fire

Japan forms part of the Pacific Ring of Fire, a belt of volcanic activity and frequent earthquakes around the Pacific basin. The Japan Meteorological Agency classifies 111 volcanoes as active, which amounts to roughly 7% of the world's active volcanoes. Volcanism is organized into arcs: the Northeast Japan and Southwest Japan volcanic belts and the Ryukyu-Okinawa arc each reflect a different slab geometry. Sakurajima in Kyushu is among the most frequently erupting volcanoes in the country, and large calderas such as Aso are concentrated in the same zones.

Underground heat from this setting also produces the country's hot springs, known as onsen. The Ministry of the Environment recorded about 27,900 hot spring sources and 2,879 hot spring areas with lodging facilities at the end of fiscal 2022. Volcanic heat is only part of the explanation. Abundant rainfall and groundwater that circulates through heated rock also feed the springs, and some hot water, such as at Arima, emerges far from any active volcano.

Accreted terranes and the shaping of the landforms

Much of the Japanese crust did not form in place. Sediments and rock fragments, known as terranes, were scraped off the descending plate and added to the margin of the Eurasian Plate over time. Such accretion, together with metamorphism and magmatism, built the land in successive stages. One tectonic model proposes that pairs of terranes in southwest and northeast Honshu rotated in opposite directions between about 22–21 and 14–11 million years ago, opening the Sea of Japan back-arc basin in the process.

The Fossa Magna is a rift lowland that cuts across central Honshu at right angles to the arcs. Its western boundary is the Itoigawa–Shizuoka Tectonic Line and its eastern boundary is the Tanakura Tectonic Line. It separates the Northeast and Southwest Japan blocks. The name, meaning "great crevasse" in Latin, was given by the German-born geologist Heinrich Edmund Naumann in the nineteenth century. The rift began opening in the early Miocene and was later inverted by compression, which is why it now forms a basin between mountain ranges rather than a gap.

The Median Tectonic Line is Japan's longest fault system. It runs roughly parallel to the volcanic arc, from near Ibaraki Prefecture through central Honshu and the Inland Sea to Kyushu. Its motion is right-lateral strike-slip at roughly 5–10 mm per year, which fits the oblique convergence at the Nankai Trough. Faults of this kind, along with the Fossa Magna boundaries, help explain why the landforms are so steep and fractured.

Seismic risk across the archipelago

Japan is among the most seismically active regions on Earth, and the tectonic setting determines where the risk is concentrated. Along the subduction zones, the interface between plates can lock and then slip suddenly, producing megathrust earthquakes, as at the Japan Trench. Along the Nankai Trough, the Philippine Sea Plate generates significant interplate seismicity. Because the subduction zones run along nearly the whole Pacific side and the convergence is continuous, large earthquakes can occur at many points. Crustal faults inland, such as the Median Tectonic Line, add a second source of hazard that is not tied to the trenches. The result is that seismic risk is spread across the archipelago rather than limited to one region, which shapes building standards and disaster planning in later sections of this entry. Earthquakes are therefore a permanent feature of Japanese geology, not an occasional anomaly.

Climate and ecosystems

Japan's climate is shaped by the length of the archipelago, which spans roughly 3,000 kilometres from north to south, and by the monsoon winds that cross it. Most of Honshu, Shikoku and Kyushu fall within the Köppen humid subtropical category (Cfa), which has four clearly separated seasons. Most regions, such as Honshu, Shikoku, and Kyushu, belong to the temperate zone with humid subtropical climate. Hokkaido is the cold exception: its winters are long and snowy, and it is classed under the Dfb and Dfc categories. The Okinawa and Amami islands are subtropical and oceanic in character, and the Ryukyu chain grades southward from humid subtropical toward tropical rainforest conditions. Annual mean temperatures therefore range widely, from about 7.5°C in Hokkaido to about 23.6°C in Okinawa.

Monsoon, rainy season and typhoons

The weather of the main islands is organised by the East Asian monsoon. In early summer, the tsuyu rainy season forms where warm, moist Pacific air meets cooler continental air, and it lingers for roughly four to six weeks in each region. On the main islands it usually falls between early June and mid-July, and it begins earlier in Okinawa, from around early May. Hokkaido has practically no rainy season. Later in the year, typhoons approach from the Pacific, with the season running from June to October and peak risk in August and September.

Winter weather divides the country along the Sea of Japan. Cold, dry air sweeping off the Siberian plains picks up moisture over the sea and then drops heavy snow on the western slopes of the mountains, which is why the region is known as a "snow country." The Pacific side, by contrast, enjoys drier winters.

Forests and vegetation

Forests cover about two-thirds of the land, but much of this cover is not pristine. According to a recently developed vegetation map, forests account for 67% of the total land area, including 17.9% of natural forests. Plantations occupy more than 40% of total forest area, principally as monocultures of Japanese cedar, Hinoki cypress, and larch, with the rest comprising secondary forests dominated by evergreen and deciduous oaks. Vegetation changes with latitude and altitude: evergreen forests dominate the southern lowlands, while broadleaf stands and subalpine and alpine vegetation appear further north and at higher elevations. In the Nansei (Ryukyu) chain, the forests are subtropical evergreen broadleaf forest dominated by chinquapin and Japanese live oak.

Biodiversity and endemism

The country's ecosystems are unusually rich for their size. The number of known species in Japan is estimated to be over 90,000, and to exceed 300,000 if unclassified species are included. Endemism is high: nearly 40% of land mammals and vascular plants, 60% of reptiles and 80% of amphibians are found only in Japan. The Nansei islands are especially important, as 44 percent of Japan's endemic vertebrates live here. The Ryukyu Islands alone host 21 endemic species or subspecies of mammals.

Much of this diversity depends on the satoyama landscape of secondary woodland, farmland and reservoirs around villages. According to research done by the Ministry of the Environment, more than half of the habitats of threatened species and other species that used to be found easily are distributed in the satoyama areas.

Pressures and conservation

The main threats are direct and human-driven. Habitat destruction, urbanization, and climate change threaten this richness. The lowland ecoregion that contains Tokyo, Osaka, Nagoya and Yokohama has lost most of its original forest, and the WWF lists the ecoregion as critically endangered. More than 60% of wetlands have been lost since 1992. Non-native species that compete with or prey on native wildlife are an additional pressure, particularly on island ecosystems.

Protection rests mainly on national parks and wildlife areas. 34 national parks have been established, covering 5.8% of the land. 86 wildlife protection areas at the national level cover a total of 5,930 km². An assessment using the Protected Areas Representativeness Index found that ecosystem diversity is below average, suggesting that existing reserves do not fully cover the habitats of all vertebrate, invertebrate and plant species.

Rivers, coasts and marine environment

Japan's rivers are short and steep. Most rise in mountain forests and reach the sea within a short distance, so the water level can climb and fall within hours of heavy rain. The Ministry of Land, Infrastructure and Transport notes that the ratio of peak discharge to basin area can be ten to one hundred times that of major rivers abroad. The swift current also carries large amounts of sediment down to the lowlands, where it settles and builds alluvial plains. A Dutch engineer employed in the Meiji period is often cited as having described a river in Toyama Prefecture as more of a waterfall than a river. Early farming communities depended on these floodplains for rice cultivation and used the rivers for irrigation while living with recurrent floods. They diverted channels, dammed and dredged streams, and dug irrigation ponds. Over time, embankments that confined the rivers caused sediment to accumulate in the channels, raising the riverbeds and making flooding more likely. Roughly half of the population and most of the national assets are concentrated on alluvial plains that make up only about a tenth of the land area, which is why river management remains central to agriculture and settlement. Dams, channel works and concrete embankments now shape most river systems that pass through populated areas.

The coastline is long and deeply varied. The Seto Inland Sea lies between Honshu, Shikoku and Kyushu, and its surrounding region is comparatively warm, dry and low in rainfall. Setonaikai National Park contains more than 600 islands and coastal segments, and the sea is subject to periodic red tides caused by dense blooms of phytoplankton. Since the 1980s, the Honshū–Shikoku Bridge Project has linked the sea's northern and southern shores by three routes. Much of the inland sea's shoreline is rocky rather than sandy, and it is lined with oyster farms, industry and shipbuilding. On the Pacific side, the Sanriku Coast in northeastern Honshu is a classic ria coastline, where drowned river valleys form a series of narrow, branching bays. These bays support extensive seaweed beds and shellfish and oyster aquaculture. The same bay geometry, however, tends to amplify tsunami waves, and the coast suffered severely in the 2011 Tōhoku earthquake and tsunami, when wave heights along the shore reached several metres to tens of metres. Beaches along the coasts vary widely, from sandy shores formed by weathered granite to long stretches of cliffs and rocky platforms.

The surrounding seas are shaped by the Kuroshio Current, a warm western boundary current that flows northward past the Ryukyu Islands and along the Pacific coast of Honshu. The Ryukyu Islands, which stretch south of Kyushu toward Taiwan, host coral reefs at latitudes that make them among the northernmost reef systems in the world. Warm water carried by the Kuroshio supports these coral reefs, and the current also transports coral larvae, fish eggs and larvae, and plankton from tropical waters into temperate ones. Marine biodiversity research has found that the Ryukyu region has very high levels of marine species richness for a subtropical area, and reef ecosystems there attract intensive scientific study. The current's path is not fixed: it can run close to the coast or form large southward meanders that persist for years, altering sea surface temperatures and the distribution of fish stocks. Japan's coastal fisheries, which depend on these nutrient-rich and warm-cold water boundaries, therefore respond to shifts in the current as well as to fishing pressure.

Japan's lowlands are vulnerable to the sea as well as to rivers. Many of the flat areas around Tokyo, Osaka and Nagoya lie at or near sea level, and some have been created by filling in shallow bays through land reclamation. Concrete seawalls, tide gates and drainage pumping stations protect these reclaimed zones, and their stability depends on continued maintenance. Rising sea levels and stronger storm surges increase the pressure on these defences, because the protected land is low and densely built. Planners therefore treat coastal engineering, river levees and drainage as parts of a single system, since a breach in one can flood neighbouring districts. The vulnerability of these areas links directly to the risks discussed in the sections on sea-level rise and natural hazards.

Prehistory and early state formation

The Jōmon period, the archipelago's Neolithic culture, is named for the cord-marked pottery its people made. Jōmon communities relied mainly on hunting, fishing and gathering, and they lived in small, relatively mobile groups. Their economy was not based on farming, which set the stage for the changes that followed.

The Yayoi period is defined by the arrival of irrigated rice farming and metalworking. Traditional chronology places it between about 300 BCE and 300 CE, but some scholars argue that it began as early as the tenth to eighth centuries BCE, as its chronological span is given as beginning around the 10th century BC or 9th–8th century BC and ending in the mid-3rd century AD. The label refers to a Tokyo neighbourhood where the distinctive pottery of the period was first recovered in 1884 (the Metropolitan Museum notes that Jōmon culture was gradually replaced by the more advanced Yayoi culture). Paddy cultivation, probably introduced from the Asian mainland through the Korean Peninsula or the Ryukyu chain, allowed settlements to become permanent and populations to grow. Bronze and iron implements entered the toolkit, and surplus harvests gradually supported social ranking. By the late Yayoi period, large regional polities had formed in western Japan.

Chinese dynastic histories provide the earliest outside written evidence for the islands. The name Wa, the Japanese pronunciation of an early Chinese term for Japan, first appears in Chinese sources in CE 57. The third-century Wei zhi describes a female ruler, Himiko, whose domain was called Yamatai. Where Yamatai lay remains disputed. The Chinese account places it in northern Kyushu, while many Japanese historians have argued for Yamato, the Nara basin, as the actual seat (the Chinese records, read at face value, place Yamatai somewhere in northern Kyushu, and many Japanese historians over the ages have argued that this must be a mistake). The Book of Song indicates that the many tribes and chiefdoms of the archipelago did not form more centralized, hierarchical polities until about 300, when large tombs began to appear.

The Kofun period, roughly 300 to 538, takes its name from the large earthen tumuli built for elites. Its keyhole-shaped mounds spread outward from Yamato Province. The Kofun period recorded Japan's earliest political centralization, when the Yamato Kingship rose to power in southwestern Japan and helped control trade routes across the region. Diplomatic contact with China and the Korean kingdoms intensified during this era. Chinese writing reached Japan late in the period through Baekje, and a letter from a Yamato ruler was preserved in a Chinese dynastic history dated 478.

In the mid-seventh century the ruling family of Yamato still held only an unstable primacy over the other uji clans. In 645 a coup led by Prince Naka no Ōe and Nakatomi no Kamatari removed the powerful Soga family from control of the court. The reforms that followed, known as the Taika Reform, were issued as edicts that aimed to concentrate power in the throne, create state offices modelled on the Chinese bureaucracy, and establish national systems of land holding and taxation. Historians often regard these measures as the starting point of the Japanese imperial state. Envoys and students were sent to China to study writing, religion, literature and architecture. The regime also issued a constitution in the early seventh century, traditionally associated with Prince Shōtoku, based on the Chinese model.

The reforms were followed by the codification of law in the ritsuryō system. In the Asuka and Nara periods, the court tried to replicate the rigorous political order of the Tang dynasty, producing and enforcing a series of legal codes. Central control over rice paddies and labour was the most significant change, but in practice the system never functioned exactly as its designers intended. Buddhism, which reached the court around 538 by the date commonly given, became a major element of state ritual and temple construction. The capital was established at Nara in 710, which began the Nara period (710–794). In 794 the court moved to Heian-kyō, present-day Kyoto, inaugurating the Heian period, during which the imperial court's administrative and cultural institutions became more formal and more closely tied to elite culture.

Feudal era and the shogunate

The samurai emerged in the late Heian period as armed retainers of provincial landholders and court families. Their rivalry with the Taira clan ended at the Battle of Dan-no-ura in 1185, after which Minamoto no Yoritomo set up a warrior government at Kamakura. He received the title of shogun in 1192, and the Kamakura shogunate ruled through warrior vassals and, from the 1200s, through hereditary regents of the Hōjō family, while the imperial court in Kyoto kept its ceremonial standing.

The shogunate's defining test came from the Mongol Empire. Kublai Khan, whose forces had brought Goryeo Korea under their suzerainty, sent expeditions against Kyushu in 1274 and 1281. Both were repelled, in part because storms destroyed the invading fleets, an event later remembered as the divine wind (kamikaze). The defense required mobilizing warriors across western Japan without any conquered land from which to reward them, and the resulting debts weakened the Kamakura regime. In 1333 Emperor Go-Daigo's rebellion, joined by warrior leaders including Ashikaga Takauji, brought the regime down.

Takauji established the Ashikaga, or Muromachi, shogunate in Kyoto. Its authority rested on shugo, provincial constables who gradually converted their posts into hereditary control of territories and became the regional lords known as daimyo. The Ōnin War (1467–1477) devastated Kyoto and ended effective central control, opening the Sengoku ("Warring States") period, a century of conflict among competing lords. Oda Nobunaga entered Kyoto in 1568 and removed the last Ashikaga shogun in 1573, using firearms and alliances to expand his domain. After he died in 1582, when Akechi Mitsuhide attacked him at Honnō-ji, his general Toyotomi Hideyoshi carried the unification forward. Hideyoshi's sword hunt of 1588 disarmed much of the peasantry, the 1590 siege of Odawara ended the Hōjō, and his invasions of Korea (1592–1598) failed. Tokugawa Ieyasu defeated rival coalitions at the Battle of Sekigahara in 1600, was named shogun in 1603, and the last Toyotomi stronghold at Osaka fell in 1615.

The Tokugawa shogunate (1603–1868) governed from Edo, the site of modern Tokyo. It sorted daimyo into hereditary allies (fudai) and former opponents (tozama) and placed them under strict oversight. From the 1630s, a series of edicts restricted foreign contact, a policy later called sakoku, or national isolation. Trade was confined largely to Dutch and Chinese merchants at Nagasaki, with additional contact through Korea, the Ryukyu Kingdom and the Ainu of Hokkaido. The sankin-kōtai system, formalized under Iemitsu, required daimyo to alternate residence between their domains and Edo while leaving their families in the capital. The cost of maintaining two households and the travel between them drained domainal resources and encouraged the construction of roads and castle towns, and Edo grew into one of the largest cities in the world, with more than a million residents by the early eighteenth century.

Economic and cultural life in the Edo period was shaped by the commercial growth that peace made possible. Although the official social order placed samurai above farmers, artisans and merchants, wealthy merchants in the cities became patrons of a distinctive urban culture (chōnin culture). Commercial publishers produced woodblock-printed books, poetry and illustrated works, and ukiyo-e prints circulated widely, while kabuki drew large urban audiences. Literacy spread through temple schools (terakoya), and Neo-Confucian scholarship became the official orthodoxy. Knowledge from the Netherlands, transmitted through Dejima, fed a field of Western studies called rangaku, and nativist scholars (kokugaku) studied Japanese texts and classical literature for their own sake.

Meiji Restoration and modernization

Overthrow of the shogunate and restoration of imperial rule

The Tokugawa shogunate fell in 1868 after years of rising tension. The culmination of these tensions was the Boshin War (1868-1869), a civil war between the Tokugawa loyalists and the pro-imperial forces led by the domains of Satsuma and Chōshū. Before the fighting, the rebels had seized the imperial palace in Kyoto. In January 1868, they took control of the Imperial Palace in Kyoto, issuing an edict restoring imperial rule (ōsei fukko). Historians generally treat that coup as the decisive event of the restoration, though the rebels' political aims were not fully settled at that point. Their victory in the war ended Tokugawa resistance, and the young Emperor Meiji became the head of the new government.

The leaders then set out a broad program. The Charter Oath of April 1868 committed the government to deliberative assemblies, open public debate and the search for knowledge abroad. The capital moved to the former Edo. Edo was renamed Tokyo and became the nation's capital, and the era name was changed to Meiji.

Abolition of the han system

The new government first took control of the shogunate's own lands, which accounted for approximately a quarter of the land area of Japan, and reorganized them into prefectures run by appointed governors. The larger step came in 1871. Ōkubo Toshimichi and other leaders, having gathered armies from Satsuma and Chōshū, persuaded the daimyō of several major domains to hand their lands back to the emperor. In 1871, Ōkubo and several other leaders held a secret meeting and decided to completely abolish the han domains. The decree took effect on 29 August 1871, and the former domains became prefectures. The former daimyō received pensions, and their castles became the local administrative centers for the central government. By the end of 1871, Japan was a fully centralized state.

The government also dismantled the feudal class order. Samurai lost their hereditary privileges, and the samurai class itself was eventually abolished. The new government reorganised whole strata of society, abolishing the old currency, the domain system, and eventually the class position of the samurai. Samurai discontent produced armed revolts, most notably the Satsuma Rebellion of 1877, which the government crushed.

Western models and rapid industrialization

The oligarchs who led the government, many of them from Satsuma and Chōshū, aimed to modernize Japan and secure its independence by adopting Western methods of government, industry, and military. Their slogan, fukoku kyōhei ("rich country, strong army"), captured the two goals of economic growth and military strength. Western practice guided new legal codes, schools and the army. Officials sent students and advisers abroad and invited foreign specialists to teach at home.

Industrial and infrastructure projects followed. Over five decades, the Meiji oligarchs dismantled the samurai class, created a conscript army, built railways and telegraphs, and rewrote the legal code. Shipbuilding and other heavy industries were built up with state support. Large family-run conglomerates, later known as zaibatsu, grew out of this state-backed expansion and came to dominate much of the economy.

The political order was given a written constitution in 1889. The constitution of the Empire of Japan was proclaimed on February 11, 1889. It established mixed constitutional and absolute monarchy based on the Prussian and British models. Sovereignty was placed with the emperor, while an elected lower house and an appointed upper house formed a legislature with limited powers.

Military conflicts and territorial expansion

The new state's military strength was soon used abroad. The newly created military was used to extend Japanese power overseas as many leaders believed that national security depended on expansion and not merely a strong defense. The First Sino-Japanese War of 1894–1895 was fought with the Qing dynasty of China, mainly over influence in Korea. The 1895 Treaty of Shimonoseki recognized Korean independence, established indemnity to Korea from China, and ceded Taiwan, the Penghu Islands, and the Liaodong Peninsula to Japan, although Japan gave back Liaodong in return for a larger indemnity from China under the pressure of Russia, Germany, and France. Taiwan became Japan's first colony, which gained enormous prestige by being the first non-Western country to operate a modern colony.

The Russo-Japanese War of 1904–1905 followed. Japan won possession of southern Sakhalin and a position of paramount influence in Korea and southern Manchuria. Japan went on to annex Korea in 1910, and that annexation completed the expansion that the Meiji reforms had made possible.

Imperial expansion, World War II and occupation

Japan's overseas acquisitions began with the First Sino-Japanese War of 1894–1895, which ended with Qing China losing its influence over Korea and ceding Taiwan and the Penghu Islands to Japan. Japan was then forced to return the Liaodong Peninsula after the Triple Intervention by Russia, France and Germany. Korea was annexed in 1910 and ruled as a colony until 1945. In the 1930s, the Kwantung Army seized Manchuria and set up the puppet state of Manchukuo in 1932. By late 1941, Japan controlled Manchuria, Taiwan, Korea, parts of coastal China and French Indochina, and the colonial and military administrations in these territories were run largely for Japanese strategic and economic interests.

The Second Sino-Japanese War began with the clash at the Marco Polo Bridge in July 1937 and continued until Japan's surrender in September 1945. Japanese forces captured Nanjing in December 1937, and the city's capture was followed by mass killings of civilians. Casualty figures remain disputed. Chinese sources put the total number of Chinese military and civilian casualties at around 35 million, while most Western historians put the figure at no less than 20 million. Japanese medical data cite between roughly 456,000 and 700,000 Japanese military dead in the war in China and elsewhere. Japan's wartime economy was placed on a footing of mobilization, with industry and resources redirected toward the military and the conflict in China.

After the attack on Pearl Harbor in December 1941, Japan fought the Pacific War against the United States and its allies across the Pacific islands and parts of Southeast Asia. Fighting in the jungle interiors of the islands was bitter, and Japanese forces often refused to surrender. Allied air forces then carried out a bombing campaign that destroyed more than 60 Japanese cities. The atomic bombings of Hiroshima and Nagasaki in August 1945 killed large numbers of civilians, and Japan announced its acceptance of the Allied surrender terms in mid-August. The formal surrender was signed on 2 September 1945.

The Allied occupation was led by the United States through the Supreme Commander for the Allied Powers (SCAP), General Douglas MacArthur, and it had direct control over the main islands, while the Ryukyu Islands were placed under separate American administration. SCAP's early work focused on supplying food, shelter and public health services to avoid famine and epidemics in the winter of 1945–1946, and then on demilitarization and democratization. Land reform transferred agricultural land from landlords to tenant farmers, and labor unions were encouraged. SCAP also ordered the dissolution of the zaibatsu, the large conglomerates seen as partners of the military. The Emperor was allowed to remain on the throne but was required to renounce his claims to divinity. The 1947 constitution guaranteed civil liberties, labor rights and women's suffrage, and education reforms removed militaristic content from schools. Some reforms were later scaled back. From 1948 onward, U.S. policy shifted toward economic reconstruction and anti-communism, a change known as the Reverse Course, and some economic measures were relaxed.

The San Francisco Peace Treaty was signed on 8 September 1951 by Japan and 48 nations, ending Japan's status as an imperial power and terminating the occupation. The treaty came into force on 28 April 1952, restoring Japan's sovereignty. The Ryukyu Islands, including Okinawa, remained under U.S. administration until 1972. On the same day, Japan and the United States signed a separate security treaty that allowed American forces to remain in Japan after the occupation ended, and this arrangement became a central feature of Japan's postwar foreign relations.

Postwar political system and government

Japan's current constitution was drafted under the Allied occupation after the Second World War. It came into effect on 3 May 1947 during the occupation of Japan by the Allies, which lasted until 28 April 1952. The document places the sovereignty of the state in the people and guarantees fundamental human rights, within a parliamentary system. The emperor remains the head of state, but in a ceremonial role: the Emperor is the symbol of the state but does not have any effective political power. The constitution therefore separates symbolic state functions from the political authority held by elected institutions.

Article 9 is the most debated provision. It rejects war and the threat or use of force as a means of settling international disputes, and it bars the maintenance of war potential. The Japanese government has taken the position that the Constitution's "renunciation of war" refers only to military aggression, and that it does not deny Japan the natural right to defend itself. The government has claimed that the Self-Defense Forces are constitutional because they are not "war potential" but the minimum capability necessary for Japan's self-defense. Under this reading, the Self-Defense Forces were established in 1954, after the Korean War and Cold War pressures had pushed Japan to rebuild defensive capacity. In strictly legal terms, the Self Defense Forces are not land, sea or air forces, but are extensions of the national police force. The Supreme Court addressed the question in the 1959 Sunakawa case, which upheld the legality of the U.S.–Japan security arrangement, while the Japanese Communist Party firmly defends Article 9 and holds that Japan should ultimately aim for the SDF's dissolution. Constitutional revision of Article 9 remains a standing point of partisan dispute.

The National Diet is the country's legislature and the only body with the power to make laws. It is composed of a lower house, called the House of Representatives, and an upper house, the House of Councillors. Both houses are directly elected under a parallel voting system. The lower house has 465 members, with a term of up to four years, of whom 289 are chosen in single-seat districts and 176 through proportional representation. The upper house has 248 members serving six-year terms, and one-half of the members stand for election every three years. The lower house holds the decisive weight: in case of a deadlock between the two houses over the selection of a prime minister, the vote of the lower house takes precedence.

The Diet also selects the head of government. Executive power is vested in the Cabinet, which is led by the Prime Minister who is nominated by National Diet and appointed by the Emperor. He appoints several Ministers of State to make up his Cabinet and oversee various government departments, but the majority must be members of the Diet. The cabinet is collectively responsible to the Diet. The judiciary is independent of these branches and is headed by the Supreme Court; the cabinet has the authority to designate the chief judge and appoint the other judges of the Supreme Court.

Party politics after 1945 was shaped by the conservative Liberal Democratic Party (LDP). The Liberal Party and the Japan Democratic Party merged in 1955 to form the Liberal Democratic Party, which would go on to enjoy a majority in government until 1993. Its rivalry with the Japan Socialist Party defined the so-called 1955 system. The only interruption to the party's rule was a brief ten-month period in 1993–94, when a small group split from the LDP to seize power as part of a disparate coalition. The 1993 election was a turning point: the LDP, which had been in power since 1955, lost their majority in the House. An eight-party coalition government was formed and headed by Morihiro Hosokawa. A 1994 electoral reform aimed to replace one-party dominance with a two-party system with alternation in power, and it introduced a system in which citizens had two votes: one for a party and one for a candidate. The LDP returned to government after 2012, but it has since relied on coalitions, first with Komeito and currently with the Japan Innovation Party (JIP). A Liberal Democratic minority government has held office since 2025.

Administrative divisions and local government

Japan's public administration has three basic levels: national, prefectural and municipal. The bureaucratic administration of Japan is divided into three basic levels: national, prefectural, and municipal. The legal framework for the lower two levels is the Local Autonomy Act of 1947, which sets out the powers of local governments.

The first tier consists of 47 prefectures, which rank immediately below the national government. They are legally of four types. Forty-three are ordinary prefectures (ken), two are urban prefectures (fu), namely Osaka and Kyoto, one is a regional circuit (dō), Hokkaido, and one is a metropolis (to), Tokyo. Although different in name, they are functionally the same. The present arrangement dates to 1871, when the Meiji government replaced the feudal domains (han) with prefectures. Although there were initially over 300 prefectures, many of them being former han were later merged into the current 47.

Above the prefectures, Japan is commonly grouped into eight regions: Hokkaido, Tōhoku, Kantō, Chūbu, Kansai, Chūgoku, Shikoku and Kyūshū. Okinawa is usually counted within Kyūshū, though it is sometimes treated as a ninth region. They are not official administrative units, though they have been used by government officials for statistical and other purposes since 1905. Some references present them as a formal tier, which conflicts with the more common view that they are informal blocs used for planning, statistics and everyday reference. Below the prefectures, the country has more than 1,700 municipalities. Normally, the municipalities are divided into cities, town and villages but in Tokyo, the unusual Special Wards have existed since 1943. Within the city category, some cities hold expanded powers that are otherwise exercised by prefectures. Designated cities and core cities are the main examples of this, and one database counts 20 designated cities (政令指定都市), 41 core cities (中核市).

Tokyo has a distinctive structure. Since 1943 its governing structure has been more akin to that of a prefecture, with an accompanying Governor and Assembly taking precedence over the smaller municipal governments that make up the metropolis. Its core consists of 23 special wards, which account for what was the core Tokyo City, before it was abolished in 1943 under the Tōjō Cabinet. The wards regained autonomy after 1945, and in April 1975, as a result of the amendment of the Local Autonomy Law, a new special ward system was initiated, and ward mayors were publicly elected. Wards in other large cities, such as Osaka and Kyoto, do not have the same powers as the special wards of Tokyo.

Fiscal relations between the centre and localities are central to local governance and are closely tied to population. Local governments receive large transfers from the state. Among these, allocation taxes (state grants to local governments) are calculated on a per capita basis, which gives municipalities a financial reason to attract and keep residents. Depopulation has made this difficult in rural areas. The Ministry of Land, Infrastructure and Transport has identified a decrease in the level of government services due to lower tax revenues: reduction or termination of local public transportation as one consequence of population loss. Rural decline has been termed Kaso, which means, 'very scarce and/or too depopulated'. Central investment in these areas has been substantial. The total amount of investment during the 1970-2018 period was about 1 trillion USD, of which almost 40 percent was used for the improvement of roads and communication networks. However, despite this huge investment, most rural municipalities in Japan have been endangered due to persistent depopulation and aging. The government has also projected that half of the current municipalities in Japan would disappear by 2040, and population fell in 45 of Japan's 47 prefectures in 2024.

Okinawa Prefecture is the most distinct part of the administrative system. The Ryukyu Islands were an independent kingdom until 1879, when they were incorporated into Japan as Okinawa Prefecture. After the Pacific War, the islands were administered by the United States until their return to Japanese control in 1972, and the prefecture still hosts a large share of the US military presence in Japan. Its local government operates under the same prefectural framework as the others, but its history, language and geography give it a separate place in the country's regional arrangements.

Economy and industry

After the Second World War, Japan rebuilt from a devastated industrial base into one of the largest economies in the world. The rapid expansion is often called the "economic miracle." One summary puts the growth of GDP at an average of 9.2 percent a year between 1956 and 1973, and still about 4.1 percent a year through 1989, despite the oil-price shock of the 1970s (Japan's Gross Domestic Product (GDP) increased by a rather amazingly large average of 9.2% between 1956 and 1973, and even after the world recession caused by the rise in oil prices in the 1970's, still grew by an average 4.1% up through 1989.). Heavy industry and an expanding middle class drove the process, creating a domestic market and a pool of household savings that banks channelled into corporate investment in plant and equipment (growth was driven by its heavy industries and the expansion of the middle class, which provided both a large domestic consumer market and bank savings. These savings were, in turn, lent to companies to invest in fixed capital.). Ikeda Hayato's cabinet put into practice an economic program devised by Shimomura Osamu, which made government intervention a visible part of the story (The Japanese government's interventionism also played a role, most notably through the Income Doubling Plan, conceived by Osamu Shimomura and implemented by prime minister Hayato Ikeda.). Scholars differ on how much weight to give state planning. One economist argues that Japan did not follow free-market principles during those decades (Ajit Singh argues that throughout the 1950s, 60s, and 70s, Japan did not adhere to free-market principles.), while a comparative study estimates that per capita output would have been roughly $1,288 a year lower on average without the US–Japan alliances (This result suggests that Japan's per capita GDP would have been smaller by an average of about $1,288 per year without the US–Japan alliances.). Growth moderated after the early 1970s, when the expansion settled into lower but steady rates (The Japanese economic pie grew at an annual rate of ten percent from the mid-1950s until the Arab oil shocks of the early 70s. The Japanese then managed to maintain much more modest but steady growth rates until the early 1990s.).

Export-oriented manufacturing became the core of the economy. In the 1950s and 1960s, a coalition of bureaucrats and businesspeople steered the economy toward exports, relying on domestic investment, acquired foreign technology, protective trade barriers and industrial policy (a coalition of Japanese bureaucrats and businesspersons set Japan on a path of export-led growth, buoyed by massive domestic investment, foreign technology acquisition, protectionist barriers, and well-designed industrial policies.). Manufacturing strengths include consumer electronics, automobiles, optical media and semiconductors (Leveraging advanced technology, Japan is a leading manufacturer of consumer electronics, automobiles, optical media, and semiconductors.), and one source ranks the automobile industry third largest in the world (Japan's automobile industry is the third-largest globally, with companies like Toyota, Honda, ...). Large corporate groups known as keiretsu re-formed after the war, and they competed hard in both domestic and foreign markets (adjustments in the allocation of bank credit and the formation of cartels favored the reemergence of conglomerate groupings (keiretsu). These groups competed vigorously with one another for market share both within and outside Japan). Their dealings with smaller firms were organised through interlocking production and sales arrangements (Interlocking production and sales arrangements between greater and smaller enterprises characterized corporate relations in most markets.).

The service sector is now the largest part of output. A 2024 breakdown gives services about 74.7 percent of GDP, industry 24.4 percent and primary industries about 1 percent (In 2024, the primary sector contributed around one percent to Japan's GDP, 24.4 percent came from the industry and 74.7 percent from the service sector.), while other sources place services at roughly 70 to 71 percent, so the figures depend on classification (Japan's economy remains predominantly service-oriented, with the services sector contributing approximately 71% to the nation's GDP as of 2024.). Small and medium-sized enterprises form the base of the business sector. By the government's capital-based definition they account for 99.7 percent of firms, close to 70 percent of private-sector jobs and roughly 55 percent of gross value added (Small and medium enterprises (SMEs) account for 99.7% of all enterprises in Japan and close to 70% of private sector jobs. Moreover, SMEs account for approximately 55% of gross value-add across the Japanese economy.). Productivity lags behind: MSMEs are only 52% as productive as large companies in Japan compared with 60% in advanced economies. A McKinsey Global Institute analysis estimates that narrowing this gap would be equivalent to 9.6% of GDP in Japan compared with 4.7% among a sample of advanced economies.

The early 1990s brought the collapse of the asset bubble. Following the 1985 Plaza Accord, which pushed up the yen, the Bank of Japan cut its discount rate from 5.0 to 2.5 percent by February 1987, and cheap credit inflated land and share prices (To offset the contractionary effect, the Bank of Japan cut the discount rate from 5.0 percent to 2.5 percent by February 1987, according to the Bank of Japan historical rate data. Cheap credit flooded the economy.). The Nikkei index reached its peak of 38,916 on 29 December 1989 (The Nikkei stock market index reached a peak of 38,916 on December 29, 1989.). Tightening followed under Governor Mieno Yasushi, who raised the rate to 6.0 percent by August 1990 (Yasushi Mieno, appointed BoJ Governor in December 1989, prioritised curbing speculation. The BoJ raised the discount rate from 2.5 percent to 6.0 percent by August 1990.). The Nikkei lost 60 percent of its value by 1992 (The Nikkei lost 60 percent of its value by 1992.), and land prices fell 15.5 percent in 1991 across six major cities alone (Land prices started crashing in 1991, with average commercial, residential and industrial prices across Japan's six major cities dropping 15.5 percent during the year.). Banks carried large bad loans, and regulators' slow response let weak institutions survive as zombie banks (by regulators failing to act quickly once banks exhibited clear signs of being in trouble, what could have been a short blip in Japan's economic history ended up becoming a decade of significant underperformance as the numbers of zombie banks and companies soared). Consumer prices turned negative in 1995 and again in 1999 (The Consumer Price Index turned negative in 1995 and again in 1999.), and this period, known as the "lost decades," extended well beyond the 1990s.

Monetary policy was pushed into unconventional territory. According to one economic history source, the Bank of Japan began what is described as the first true quantitative easing in modern history in March 2001 (The Bank of Japan initiated the first true quantitative easing in modern history in March 2001 under Governor Masaru Hayami.). The policy rate was normalised from March 2024, and by April 2026 it stood at 0.75 percent, the highest level since September 1995 (Japan's Lost Decades ... only began normalising rates in March 2024. By April 2026, the Bank of Japan policy rate stood at 0.75 percent, the highest level since September 1995.). The outlook remains constrained by demographics. The International Monetary Fund projects modest growth of 0.6 percent for 2026, and the government identifies low growth, an ageing population and a shrinking workforce as long-term challenges (Attracting FDI is part of the government's strategy to reform and revitalise the Japanese economy, which continues to face several long-term challenges, notably low growth, an ageing population and a shrinking workforce.). Labour shortages and debates over productivity and wage growth therefore remain central to economic policy.

Population, society and demography

Japan's population has been falling since the mid-2000s, and the 2025 census recorded the steepest drop yet. The preliminary count put the population at 123,049,524 as of 1 October 2025, a decrease of 3.1 million compared with five years earlier. The finalised results, released in late September, put the total at about 122.97 million. This was the third straight census showing a decline, following the first drop in 2015, the first since the government began conducting the census in 1920. The rate of decline rose from 0.7% in 2020 to 2.5% in 2025 (the rate of decline rose from 0.7% in 2020 to 2.5% in 2025).

The decline reflects two long-running trends: low fertility and an ageing population. Japan's birth rate has been below the replacement level of 2.1 children per woman for decades. The Ministry of Internal Affairs and Communications attributed the fall to the graying population and the widening natural decrease, in which deaths outnumber births. The share of people aged 65 and over reached a record 29.4% in 2025 (people aged 65 and over accounted for a record-high 29.4 percent of the population), and the number of Japanese nationals fell by 3.5% to 119.1 million (the number of Japanese nationals revealed an even steeper decline of 3.5% to 119.1 million). Japan's life expectancy remains among the highest in the world. The 2025 life tables give 81.35 years for men and 87.33 years for women (For men, average life expectancy was 81.35 years, up 0.25 years from the previous year. For women, the figure was 87.33 years, up by 0.2 years.). Women held the top global ranking, while men ranked seventh (Japan ranked seventh in male life expectancy, following Sweden, Switzerland, Italy and others, while taking the top spot in female life expectancy.). Policy debate has therefore centred on sustaining regional communities and the economy as the working-age population shrinks (pressure is mounting on the government to devise policies for sustaining regional communities and the economy).

Population is highly concentrated in a few urban regions, while much of the countryside loses residents. Tokyo had the largest population at 14,246,219, accounting for 11.6% of the total. The Tokyo metropolitan area, which includes Kanagawa, Saitama and Chiba, held 37.0 million, or 30.1% of the national population, and this share passed 30% for the first time in the 2025 census (30.1% of the population was concentrated in the Tokyo metropolitan area). Only Tokyo and Okinawa grew between the two censuses (only Tokyo and Okinawa posted population growth compared with the previous survey). Among the prefectures that lost population, Hokkaido recorded the largest absolute decline, at 239,000 people (Hokkaido recorded the largest drop at 239,000 people). The rate of decrease grew in 39 prefectures, and in Shimane it reached -6.2% (the rates of decrease grew in 39 prefectures, including Shimane (from -3.3% to -6.2%)). Household numbers rose even as the population fell, to 57.1 million, which is a new high. At 2.15, the average number of household members is at its lowest point since comparable records began in 1970.

The population includes a Japanese majority, along with Indigenous and regional groups and a growing foreign-resident community. The Ainu of Hokkaido and the Ryukyuan people of the Ryukyu Islands, including Okinawa, are distinct groups within the national population. The number of foreign residents has risen sharply. The Immigration Services Agency reported 4,125,395 foreign residents as of the end of December 2025, up 356,418 (9.5%) from a year earlier. The census, which uses a different counting method, recorded foreign residents jumped 40% to a record high of 3.84 million. By nationality, China: 930,428 (+57,142) — the largest group, roughly 23% of all foreign residents, followed by Vietnam. Foreign residents make up a record share of the population of about 3.4% (foreigners make up just 3.4% of Japan's population, the share has increased to a record high). Rules for long-term residence have been tightened, and debate over the role of immigration continues (tougher rules and higher fees are making it even more difficult for foreigners to obtain residency).

Language, writing and education

Japanese is the national language and the mother tongue of nearly the entire population. It belongs to the Japonic family and is usually described as agglutinative, with verbs placed at the end of clauses. Its writing system combines three scripts. Kanji, logographs borrowed from Chinese, carry most content words. Hiragana and katakana are syllabaries that developed in the Heian period from simplified kanji: hiragana is used for native words and grammatical endings, and katakana for loanwords, foreign names and onomatopoeia. Many formal and academic words are Sino-Japanese compounds, with readings derived from Chinese, while words of Western origin are normally written in katakana. The government's list of characters for general use (the Jōyō kanji) contains 2,136 characters following the 2010 revision. The continuing use of kanji alongside the two kana scripts is one reason the writing system is often cited as difficult for learners, and it also means that written Japanese can be read quickly by a literate public.

Japan is not wholly monolingual in practice. The Ainu language, a language isolate traditionally spoken in Hokkaido, southern Sakhalin and the Kuril Islands, has been severely reduced. After Hokkaido was formally incorporated in 1869, Japanese settlement increased and the Meiji government pursued assimilation policies, including Japanese-only schooling, which lowered the number of speakers. The UNESCO Atlas of the World's Languages in Danger classifies Ainu as critically endangered, the second most severe of its five levels, and its 2009 edition cited about 15 remaining speakers. The youngest fluent speakers are generally grandparents or older. Government measures, including a 1997 law on Ainu culture, were widely criticized as too limited. Community classes and the Symbolic Space for Ethnic Harmony (Upopoy) in Shiraoi, which opened in 2020, have supported a growing number of younger learners. The Ainu language has a dialect tradition that is now represented mainly by the Hokkaido variety.

The Ryukyuan languages are sister languages of Japanese, spoken on the southwestern islands including Okinawa, Amami and Miyako. Their status varies by island. In the 2009 UNESCO atlas, Amami, Kunigami, Okinawan and Miyako were listed as definitely endangered, and Yaeyaman and Dunan as critically endangered. Okinawa's situation is the most favorable, while Amami and Yonaguni are in a weaker position. Scholars have argued that the national emphasis on a single language has left little room for official support, and classifications differ between UNESCO editions and other sources. Hachijo, spoken on the Izu islands, is also recognized as endangered, and the terms endangered language and heritage language are used in Japanese policy debates.

Education is compulsory for nine years, covering elementary school and lower secondary school, and it is free at public schools. The 1947 Constitution guarantees the right to an equal education and requires that children under a guardian's care receive ordinary education, and the Fundamental Law of Education and the School Education Law of the same year established the 6-3-3-4 structure: six years of elementary school, three of junior high, three of senior high and four of university. The school year runs from April to March. The Ministry of Education, Culture, Sports, Science and Technology (MEXT) sets the national Courses of Study, while prefectural and municipal boards of education administer most public schools. Upper secondary education is attended by almost all students, and it includes general, vocational and specialized tracks, as well as the technical colleges known as KOSEN. Entry to upper secondary school and university is decided by entrance examinations rather than automatic progression.

Higher education is large and heavily private. In the 2020s, Japan had more than 800 universities, including 86 national universities, roughly 100 public universities and over 600 private institutions. Private universities have enrolled about 80 percent of students in MEXT figures from 2011. National universities were reorganized as National University Corporations in 2004 and given limited autonomy, and in 2017 the government created a designation for research-focused "Designated National Universities," with ten selected by 2021. The falling number of 18-year-olds, from about 2.1 million in 1992 to 1.2 million in 2015, has left many private institutions under-enrolled. MEXT's Global 30 project aimed to attract international students and strengthen the global competitiveness of universities. Public spending is also distinctive: according to OECD figures reported for Japan, government sources fund most primary and secondary education costs but only about 37.5 percent of tertiary funding, far below the OECD average. Japan's adult literacy results in the OECD's 2023 Survey of Adult Skills were well above the OECD average, which supports the view that schooling provides broad basic skills, although the extent to which education drives social mobility remains a subject of debate.

Religion, belief and philosophy

Shinto

Scholars disagree about where Shinto came from. Some trace its roots to the animistic practices of the ancient Jōmon people, while others suggest influences from Korean shamanism following migrations to Japan. Its central concept is the kami, spirits believed to inhabit elements of nature such as rocks, mountains, and rivers. Deceased people can also join the kami, and families honor them as ancestral spirits. Humans become kami after they die and are revered by their families as ancestral kami.

Founders, canonical scriptures and binding doctrines play little role in the tradition, so ritual participation rather than doctrinal assent is central to it. Shintō lacks a founder, sacred scriptures in the strict sense, and fixed dogmas, yet it has maintained its core beliefs throughout history. Shrines (jinja) are the main sites of worship. These sacred sites typically feature a gateway called a torii, an ablution basin for purification, and a main sanctuary (honden) housing a sacred symbol (shintai) representing the kami. The sun goddess Amaterasu holds the highest rank among the kami, and her shrine at Ise is rebuilt on a regular cycle, a practice that symbolize[s] renewal.

The modern state reshaped Shinto for political ends. Under the Meiji government, the state tied the emperor to sacred authority and used the tradition to support nationalism. State Shinto was a political construction imposed by the Meiji government from 1868 onward. It tied Shinto to imperial authority, framed the Emperor as a living kami, and was used to mobilize nationalist ideology during Japan's military expansion. After 1945, state support for Shinto was removed, and the constitutional separation of religion and state is discussed below.

Buddhism

Teachings from China and the Korean kingdom of Baekje entered the islands in the sixth century, with the traditional dates given as 538 or 552. Buddhism reached Japan in the 6th century CE — traditionally in 538 or 552 — carried from China and the Korean kingdom of Baekje. The absence of an afterlife doctrine in indigenous belief let the two traditions share space for centuries. Blended practice, known as shinbutsu-shūgō, represented Japan's dominant religion before the rise of State Shinto in the 19th century.

Several schools developed in the Heian and Kamakura periods. Tendai and Shingon took root in the Heian court, while Zen, Pure Land and Nichiren spread among wider audiences in the Kamakura age. Rinzai Zen was, in Britannica's words, "transmitted to Japan in 1191 by the priest Eisai." Sōtō Zen was established by the master Dōgen (1200–1253). Zen's disciplined training became popular in Japan around the 12th Century, in particular with the warrior class who liked its strict discipline.

Pure Land teachings emphasized faith rather than monastic training. Practitioners rely on trust in the Buddha Amida and on chanting his name, the nembutsu, in hope of rebirth in his paradise. The Pure Land schools offered a path of faith and grace rather than arduous self-effort: trust in the Buddha Amida (Amitābha) and the recitation of his name (nembutsu) to be reborn in his Pure Land. Hōnen and his disciple Shinran are regarded as the founders of its two main forms, Britannica names Hōnen (1133–1212) and his disciple Shinran as "the founders of the two main Pure Land forms of Japanese Buddhism." Shinran's branch, Jōdo Shinshū, later became a lay-oriented school. Temples also took on the registration of households and the handling of funerals and ancestral rites, roles that many Japanese families still associate with Buddhism.

Syncretism and Confucian ethics

Many Japanese take part in both Shinto and Buddhist rituals in the course of a life. Shrines often host weddings and New Year visits, while temples commonly conduct funerals and memorial services. Survey figures on affiliation illustrate the overlap: Shintoism (48.6%), Buddhism (46.2%), Christianity (1.10%), others (4.00%). The totals exceed 100 percent because respondents may claim more than one tradition.

Confucianism, introduced from China, shaped ideas of filial piety, hierarchy and loyalty. Under the Tokugawa shogunate, Neo-Confucian thought became influential among officials and scholars, and its ideas about family order and proper conduct informed household ideology. Alongside it, the "National Learning" (kokugaku) movement of the Edo period sought to recover indigenous texts and ideas, a line of thought that later fed into nationalist readings of Shinto.

Christianity and new religions

Christianity reached Japan in the sixteenth century. Christianity first arrived in Japan in 1549, but was banned for some 250 years during the Edo period (1603–1868). Only small pockets of "Hidden Christians" continued practicing their religion in secret. The Meiji era brought a formal guarantee of belief, and the number of Japanese Christians has been slowly increasing again.

Christians remain a small minority. In the early years of the 21st century, between less than 1 percent and 1.5% of the population claimed Christian belief or affiliation. In 2024, there were 1.87 million Christians according to one study. Government data for end-2023 recorded 300,921 followers (0.73% of the total population of Japan). The gap between these figures reflects different counting methods.

The postwar constitution guarantees freedom of religion in Article 20, bars the state from conferring privileges on religious organizations, and prohibits state involvement in religious education or activity. Newer religious movements, including Tenrikyo, founded in the nineteenth century, and the lay Nichiren-based Sōka Gakkai, have built large followings.

Festivals and seasonal observances

Matsuri are the most visible form of shared religious life. Most are held at shrines and tied to the agricultural calendar or to local tutelary kami, and they often involve processions with portable shrines (mikoshi) carried through neighborhoods. Major examples include the Gion Matsuri in Kyoto and the Kanda Matsuri in Tokyo. Seasonal observances such as New Year shrine visits (hatsumode), the spring and autumn equinox rites, and the mid-August Obon festival for honoring ancestors draw on both Shinto and Buddhist practice. Many people who would not describe themselves as Shinto adherents still take part in shrine visits that mark milestones in life.

Arts, literature and popular culture

Literature

Japanese literature has a continuous record from the seventh century onward, and for its early centuries much of it was written in classical Chinese before a Japanese-language tradition took firm shape. Literature of the Heian court (794–1185) is the foundation of this tradition. Around 1010, the court lady Murasaki Shikibu completed The Tale of Genji, a prose narrative of 54 chapters that follows the courtier Hikaru Genji across roughly seventy years and includes some 800 waka poems. It is widely regarded as the world's first novel, and later writers drew on its language, its chapter titles and its characters for centuries. Twelfth-century picture scrolls based on the work, the Genji Monogatari Emaki, are among the earliest surviving examples of narrative painting in Japan.

Waka, a form built on a 31-syllable pattern of five lines, dominated courtly verse from the classical period into the medieval era. Its shorter successors took distinct paths. The tanka kept the 31-syllable form, while the haikai verse that grew out of renga produced the three-line haiku with its 5–7–5 pattern. Matsuo Bashō, working in the Edo period, shaped haiku into a compact vehicle for a single observed moment and for reflection on nature and impermanence.

In the modern period, Meiji-era writers such as Natsume Sōseki and Mori Ōgai adapted Western narrative techniques and debated how to write the modern self, while later novelists explored naturalism, psychological fiction and social critique. Yasunari Kawabata received the Nobel Prize in Literature in 1968, and his work is among the best-known Japanese fiction in translation.

Performing arts

Three classical theatre traditions are central to Japanese performance. Noh, which took its mature form in the fourteenth century under the playwright and actor Zeami, combines masked performers, slow and stylized movement, poetic chanting and sparse staging. It is usually performed as a sequence of short plays interspersed with comic kyōgen interludes. Kabuki emerged in the early seventeenth century in the urban culture of Edo-period cities. Its productions are known for elaborate costumes, exaggerated make-up, stylized acting and stage devices such as the raised walkway through the audience, and early female performers were replaced by male actors, with specialised onnagata playing female roles. Bunraku, the puppet theatre that flourished in Osaka, relies on large puppets manipulated by visible operators alongside a chanting narrator and shamisen accompaniment.

Japan's traditional performing arts also include court music (gagaku) and the Okinawan musical theatre kumiodori. UNESCO has recognised several of these forms as intangible cultural heritage, among them Noh and Kabuki, which reflects the continuing public support for their training and performance.

Painting, printmaking and cinema

Ukiyo-e ("pictures of the floating world") were mass-produced woodblock prints that flourished in Edo from the seventeenth century. Their subjects were courtesans, kabuki actors, famous sites and scenes of urban life, and their makers ranged from Katsushika Hokusai, whose Great Wave off Kanagawa is among the most reproduced images in the world, to Utagawa Hiroshige and the short-lived actor-print designer Tōshūsai Sharaku. Ukiyo-e exerted a strong influence on European painters in the nineteenth century, and the broader taste for Japanese design that followed is known as Japonisme. Japanese painting also developed the nihonga style in the Meiji era, which combined ink and mineral pigments with native techniques in response to Western painting.

After the Second World War, Japanese cinema reached a global audience. Akira Kurosawa's Rashomon (1950) won the Golden Lion at the Venice Film Festival and helped open Western markets to Japanese films, while Yasujirō Ozu's quiet domestic dramas, such as Tokyo Story (1953), became touchstones of world cinema. Later directors, including Hayao Miyazaki, extended this reach through animation.

Manga, anime, video games and other popular forms

Manga, the Japanese comics tradition, drew on illustrated narratives and the Edo-period print culture, and it expanded rapidly after 1945 under figures such as Osamu Tezuka, whose Astro Boy became both a manga and a television series. From the 1960s, animated television series exported through foreign broadcasts, and by the 1980s and 1990s works such as Akira, Dragon Ball and Sailor Moon had become international hits. Studio Ghibli's films, including Spirited Away (2001), which won the Academy Award for Best Animated Feature, brought Japanese animation further into mainstream recognition. The government's Cool Japan campaign, launched in 2012, treated such cultural exports as a source of economic growth and diplomatic appeal.

Japanese video games followed a similar path, with franchises like Nintendo's and Pokémon becoming multi-billion-dollar global brands. Popular music, from the shamisen-based traditions of the theatre to contemporary J-pop, has likewise absorbed Western forms while retaining its own idioms. Fashion and design, including the work of designers who presented collections in Paris from the 1980s, and contemporary art, from artists such as Takashi Murakami and Yayoi Kusama, have carried Japanese aesthetics into international museums, galleries and markets. Taken together, these forms have made Japanese culture one of the most widely recognised cultural exports of the modern era.

Science, technology and innovation

Japan has produced many Nobel laureates in the natural sciences. Hideki Yukawa's 1949 physics prize was the first for a Japanese scientist and helped restore national confidence after the war. Counts vary with how dual nationals are treated. Including laureates with U.S. nationality, the total of Japanese-born Nobel winners reached 30 in late 2025. By field, the physics total is 12, the chemistry total is 9 and the medicine total is 6, after the 2025 awards to Shimon Sakaguchi in physiology or medicine and Susumu Kitagawa in chemistry. In 2001, the government's Second Science and Technology Basic Plan set a goal of producing 30 Nobel laureates within 50 years. Government reports have also acknowledged concern about research capacity. Japan's research capacity has been described as declining in recent years, and the Nobel record does not necessarily reflect current capacity.

Research spending is high relative to the economy. Total R&D expenditure for fiscal 2024 was 23.79 trillion yen, up 7.9 percent, and it has risen for four consecutive years to a record. As a share of GDP, this amounted to 3.70 percent. By sector, business enterprises spent 17.43 trillion yen, universities and colleges spent 4.50 trillion yen, and non-profit institutions and public organizations spent 2.31 trillion yen. Companies therefore carry most of the national research effort. In fiscal 2022, businesses accounted for about 73.1 percent of R&D spending, while universities accounted for about 18.6 percent. Government priorities are concentrated in a few fields. In the same year, funds were allocated to AI, biotechnology and quantum technology, which the government designated as fundamental technologies to be strategically addressed. Japan's research workforce is also large, with about 910,400 people engaged in R&D in 2022.

Japan's industrial base is strong in electronics, semiconductors, robotics and materials science. Its manufacturers supply precision components and production equipment across global supply chains, and the country has a long tradition of advanced materials research. High-speed rail is a flagship technology: the Tōkaidō Shinkansen opened in 1964 between Tokyo and Osaka, and the network has since expanded across the main islands. Robotics has become a central policy focus. In early 2026, the Ministry of Economy, Trade and Industry announced a plan to build a domestic physical AI sector, with the aim of holding 30 percent of the global market by 2040.

Labor shortages have been a steady driver of automation. A study of Japanese industries from 1978 to 1991 found that shortages of unskilled factory workers were strongly associated with later robot adoption. Another study found that robot adoption in Japan had a positive effect on aggregate employment outcomes. The pressure is ongoing. The working-age population is projected to shrink by nearly 15 million over the next two decades, and a 2024 Reuters/Nikkei survey identified labor shortages as the main force pushing firms toward automation and AI.

Challenges remain in turning research into competitive products and in transferring technology from universities and laboratories to industry. Automation is used both to raise productivity and to maintain services in sectors such as logistics, manufacturing and elder care, where the demand for workers exceeds supply.

Foreign relations and security

Japan's security policy rests mainly on its alliance with the United States. The U.S.–Japan Security Treaty was signed in San Francisco on 8 September 1951, the same day as the peace treaty that ended the occupation. As first drafted, it let American forces stay on Japanese soil, but it did not oblige the United States to defend Japan. The revised treaty, signed in Washington on 19 January 1960, added a U.S. commitment to Japan's defense (Article V). In return, Article VI gives American land, air and naval forces use of facilities in Japan for Japan's security and regional peace. A separate Status of Forces Agreement, signed the same day, governs the legal position of U.S. personnel. U.S. Forces Japan has roughly 47,000 military personnel, and its facilities are concentrated on Okinawa. The United States returned administrative control of Okinawa to Japan in 1972. Relocating the Futenma air station and moving about 9,000 Marines from Okinawa to Guam have been long-running issues because of local opposition. Japan's own defense capacity is limited by Article 9 of the constitution, which is discussed in the postwar political system section.

Japan joined the United Nations in 1956 and has been elected to non-permanent seats on the UN Security Council many times. It is a member of the Group of Seven and of the World Trade Organization. Its official development assistance (ODA) began in 1954. Japan was the largest ODA donor in the world for much of the late 1980s and 1990s. In 2024 it provided more than half of its ODA as loans, the highest loan share among the members of the OECD Development Assistance Committee. Its aid is concentrated in Asia and Africa, and it has been active in the Pacific Islands. Japan has also promoted the "Free and Open Indo-Pacific" concept with the United States and Australia, and it has sought to offer an alternative to Chinese infrastructure financing.

Territorial disputes

Japan has unresolved sovereignty disputes with three neighbours. Each involves small, mostly uninhabited islands, but the disputes differ in origin and in the stance of the parties.

• Northern Territories (Kuril Islands), with Russia. Japan claims four islands off Hokkaido, which it says were Japanese under the 1855 Treaty of Shimoda. Soviet forces occupied them in August 1945, days before Japan's surrender, and they have remained under Russian control. Japan regards the matter as one of unresolved sovereignty and of historical grievance.
• Takeshima (Dokdo), with South Korea. Japan incorporated the islets into Shimane Prefecture in 1905 and holds that it did so as unclaimed territory. Korea's position is that Dokdo has historically been part of Korea and that the 1905 step was a precursor to colonization in 1910. In 1954 Seoul rejected Japan's proposal to refer the question to the International Court of Justice, and Korea has since administered the islets.
• Senkaku (Diaoyu/Diaoyutai), with China and Taiwan. Japan incorporated the islands in January 1895 and administers them as part of Okinawa Prefecture. Japan says they were terra nullius before that and that no sovereignty dispute exists. China and Taiwan claim that the islands were historically Chinese and that Japan's 1895 incorporation was improper. Their claims became active in 1971, after reports of possible oil and gas reserves. In 2012 Tokyo's purchase of several islands from a private owner intensified the dispute.

Relations with China and the Korean Peninsula

China and South Korea are among Japan's largest trading partners, and economic ties continue despite political friction. Relations with both are shaped by the legacy of Japanese imperial expansion, including the Second Sino-Japanese War and colonial rule over Korea from 1910 to 1945. Japan normalized relations with South Korea in 1965, but disputes over compensation for wartime forced labour and for the "comfort women" system have repeatedly strained ties. Japan's apologies, and the statements of its leaders on the past, are a recurring source of disagreement. With China, historical memory, the Taiwan question and maritime tensions around the East China Sea have combined to produce periodic crises. In 2018 Japan announced that it would end new ODA loans to China, a decision that reflected changing views on China's economic weight.

Natural hazards and disaster management

Japan's position where several plates meet makes earthquakes the most destructive natural hazard in its history, and the country's disasters have repeatedly exposed how building design, fire risk, tsunami defenses and emergency planning interact. Earthquakes are often followed by tsunamis, fires or landslides, so the death toll depends as much on what follows the shaking as on the shaking itself.

The Great Kantō earthquake of 1 September 1923, which struck just before noon when many households were cooking over open flames, is the deadliest case. Its fires caused the great majority of deaths. A total of 370,000 houses were either destroyed, burned, washed away, or buried, and more than 105,000 people died or went missing. Of these, 92,000 people, or approximately 90% of the total, lost their lives in the widespread fires. Wind from a passing typhoon fed the flames, and since the earthquake snapped water mains, the fires were not extinguished until September 3. A single crowd gathering at a riverside park on the Sumida River was overtaken by a firestorm, and most of the people there died. Since then, drills and other activities are held across Japan every year on the same date, which is why 1 September is observed as a national disaster preparedness day.

The Great Hanshin-Awaji earthquake of 17 January 1995 was a different kind of event. It was a shallow strike-slip quake that struck the Kobe area at dawn, and it showed the vulnerability of older urban buildings. The 7.3-magnitude tremor, the first recorded at the maximum 7 on the Japanese intensity scale, damaged 640,000 houses and caused the death of 6,434 people. Nearly 80 percent of the quake victims died from being crushed or suffocated in collapsed buildings. Shoddy construction and poor planning were blamed for the death toll being so high. Sections of the elevated Hanshin Expressway also toppled, and the Kobe port, which handled a large share of national exports, was badly damaged. The disaster prompted changes in building inspection, emergency response and urban planning.

The 11 March 2011 Tōhoku earthquake was a magnitude 9.0 undersea megathrust event and the most powerful quake recorded in Japan. The earthquake triggered powerful tsunami waves that may have reached heights of up to 40.5 meters (133 ft) in Miyako in Tōhoku's Iwate Prefecture. Coastal communities had very little time to react: residents of Sendai had only eight to ten minutes of warning, and more than a hundred evacuation sites were washed away. Death tolls differ by source, from about 15,500 confirmed deaths in one educational summary to more than 19,000 dead and missing in another, so the figures should be read with that range in mind.

Japan's other hazards are less sudden but still significant. Typhoons, which usually arrive in late summer and autumn, bring torrential rain and strong winds. Because the country is mountainous, heavy rainfall on steep slopes frequently triggers landslides, while short, steep rivers can flood lowland cities quickly. Volcanic eruptions present a separate threat in the volcanic arc. The 2014 eruption of Mount Ontake, which killed dozens of hikers caught on the slopes with little warning, showed that volcanic risk also affects people in recreational areas.

Risk reduction rests on several layers of policy. Building codes were strengthened in 1981, and every building constructed according to the building codes established in 1981 was unscathed in one account of the Kobe disaster, which is often cited as evidence that the revised standards worked. Earthquake early-warning messages, sent by the Japan Meteorological Agency and broadcast through television, mobile phones and public alarm systems, give seconds to tens of seconds of notice before strong shaking reaches a given location. Municipalities produce hazard maps, designate evacuation shelters and run regular drills, while the national government coordinates large-scale response. The overall framework is shaped by the national disaster management law, and prefectural and municipal governments carry out most of the day-to-day work.

The 2011 disaster also exposed weaknesses in nuclear safety. The tsunami at the Fukushima Daiichi plant overwhelmed defenses that had been designed for smaller waves. The tsunami that followed the earthquake quickly flooded the area and the rooms in which the emergency generators were housed. The generator failure led to a complete loss of power to the reactor cooling system pumps, leading to overheating of the core. The disaster resulted in a meltdown of three of the plant's six nuclear reactors. Hydrogen explosions damaged reactor buildings, and 140,000 residents within 20 km (12 mi) of the plant were evacuated. The accident prompted a review of emergency planning, including evacuation zones and the protection of backup power, and it changed the national debate over nuclear energy, with many reactors shut down for safety reviews and restarts subject to new regulatory requirements.

Environmental challenges and energy policy

Import dependence and fossil fuels

Japan's energy system rests on imports. Japan needs to import more than 80% of its energy requirements. Roughly two-thirds of its electricity comes from fossil fuels, and the fuel itself is imported. The fossil fuels used to generate about 65% of Japan's electricity are imported. Domestic energy self-sufficiency was only 7% in 2013. Natural gas was the largest single source, supplying 33% of all Japan's electricity generation in 2024, and Japan relies on LNG imports for all of its domestic gas demand. Gas-fired output has nonetheless decreased every year since 2017, as reactors restarted and solar output grew.

Nuclear power and the policy reversal

The 2011 Fukushima accident shut down most of the fleet and prompted a change in direction. A 2012 policy document recommended a phase-out of nuclear power by 2040. The policy later reversed course. The seventh Basic Energy Plan, approved by the cabinet in February 2025, replaced the goal of reducing reliance on atomic power with one of maximizing its use, and it aims to raise nuclear's share from the 2023 level of 8.5% to around 20% by 2040. The nuclear restart of Kashiwazaki-Kariwa Unit 6 in Niigata is the largest step so far. Sources differ on its date: the U.S. Energy Information Administration gives February 9, 2026, while another analysis gives 21 January 2026. Unit 7 has been delayed, with its restart pushed to 2029–2030. The unresolved issues are deciding on the final disposal site for spent fuel and other high-level radioactive waste and the decommissioning of Fukushima Daiichi.

Emission targets and carbon neutrality

Japan's emission goals are set against a 2013 baseline. The reduction target is 46% in FY2030 from FY2013 levels, with a stated effort toward 50%. FY2013 was a high point: total GHG emissions that year were their highest level ever, due to rising thermal power generation after the Fukushima disaster. The longer-term commitment to carbon neutrality was announced in 2020, when Prime Minister Suga Yoshihide unveiled the goal of net zero GHG emissions by 2050. The 2030 figure replaced an earlier goal, reducing emissions 26 percent by 2030. A government panel was reported to be considering 60% reductions by 2035 and 73% by 2040. Critics have argued that policy weight falls elsewhere: one assessment said the GX Basic Policy places more emphasis on economic growth and energy security, than on prioritising ambitious decarbonisation efforts. Some researchers and NGOs argue for a faster exit from fossil fuels, and argue that Japan can phase out fossil fuels by 2030.

Renewable energy and the grid

Renewables remain a smaller share of the mix. Solar supplies about a tenth of electricity, hydropower about 8%, and wind only about 1%. Grid management is a constraint. In March 2026, the power system was discarding internally generated renewable energy while importing power from elsewhere, which analysts attribute to dispatch rules and system operations rather than a shortage of supply. Consumers bear part of the cost through the surcharge that funds renewable purchases, which for FY2026 is JPY4.18 per kilowatt-hour. Improving transmission and energy storage is therefore central to expanding renewable energy and solar power, including offshore wind, which is still at an early stage.

Pollution history and environmental regulation

Japan's modern environmental law grew out of industrial pollution. The etiologic agent is methylmercury, a byproduct of acetaldehyde production, which was discharged from Chisso factory since 1932 until 1968. The resulting Minamata disease was first recorded in 1956, and a second outbreak occurred in Niigata, where a so-called "Second Minamata" disease epidemic broke out in the Agano River region in 1965. Public pressure produced a legislative wave: fourteen new environmental laws were passed in a single session, which included controls on toxic discharges and the polluter pays principle. The Water Pollution Control Law was enacted in 1970, and a national environmental agency followed in 1971. Legal responsibility took decades to settle: the Supreme Court ruled in 2004 that the national government and Kumamoto Prefecture were jointly responsible. Minamata City later rebuilt its image around environmental protection.

Adaptation, waste and urban heat

Beyond emissions, Japan faces the physical effects of a warming climate. Rising temperatures affect rice and other crops, shift fish stocks and marine conditions that the fishing industry depends on, and intensify urban heat in dense cities. Adaptation measures include heat-resilient crop varieties, changes to fisheries management, and urban cooling. Waste management and recycling policy also form part of the environmental agenda, given the country's limited land for landfill and its reliance on imported resources.

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229. The Korean Government refuses Japan’s proposal of referring the dispute to the International Court of Justicespf.org
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232. Looking Back on the 1923 Great Kantō Earthquakenippon.com
233. Japan's Great Kanto Earthquake kills over 140,000history.com
234. 25 Years after Disaster: Looking Back on the Great Hanshin-Awaji Earthquakenippon.com
235. KOBE EARTHQUAKE OF 1995factsanddetails.com
236. Great East Japan Earthquake and Tsunami (Tohoku) 2011preventionweb.net
237. KOBE EARTHQUAKE OF 1995 - NZ Survivornzsurvivor.co.nz
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244. Japan’s Energy Plan: New Policy Shifts Nuclear Power Stance from Reduction to Maximizationnippon.com
245. Japan's energy security response is creating a renewables blind spotieefa.org
246. U.S. Energy Information Administration logoeia.gov
247. Climate Change Japan’s initiative toward net- zero GHG emissions by 2050mofa.go.jp
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249. Japan’s Roadmap to “Beyond-Zero” Carbonmeti.go.jp
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252. Japan: Plan to Phase Out Fossil Fuel by 2030 - Climate Scorecardclimatescorecard.org
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255. Minamata: The Irresponsibility of the Japanese State - Asia-Pacific Journal: Japan Focusapjjf.org
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257. Minamata Disease The History and Measures - Chapter 4env.go.jp