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Tokyo, officially the Tokyo Metropolis, is the capital and most populous city of Japan. The population of the city proper was over 14 million as of 2023. The Greater Tokyo Area, which includes Tokyo and parts of six neighboring prefectures, is the third-most populous metropolitan area in the world, with 33 million residents as of 2025.
Lying at the head of Tokyo Bay, Tokyo is part of the Kantō region, on the central coast of Honshu, Japan's largest island. It is Japan's economic center and the seat of the Japanese government and the Emperor of Japan. The Tokyo Metropolitan Government administers Tokyo's central 23 special wards, which formerly made up Tokyo City; various commuter towns and suburbs in its western area; and two outlying island chains, the Tokyo Islands. Although most of the world recognizes Tokyo as a city, 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. Special wards in Tokyo include Chiyoda, the site of the National Diet Building and the Tokyo Imperial Palace; Shinjuku, the city's administrative center; and Shibuya, a hub of commerce and business.
Tokyo, originally known as Edo, rose to political prominence in 1603 when it became the seat of the Tokugawa shogunate, and by the mid-18th century, Edo had evolved from a small fishing village into one of the largest cities in the world, with a population surpassing one million. After the Meiji Restoration (1868), the imperial capital in Kyoto was moved to Edo, and the city was renamed Tokyo (lit. 'Eastern Capital'). Tokyo was greatly damaged by the 1923 Great Kantō earthquake and by Allied bombing raids during World War II. Beginning in the late 1940s, Tokyo underwent rapid reconstruction and expansion, which fueled the Japanese economic miracle, in which Japan's economy became the second-largest in the world at the time, behind that of the United States. As of 2025, Tokyo is home to 26 of the world's 500 largest companies, as listed in the annual Fortune Global 500.
Tokyo was the first city in Asia to host the Summer Olympics and Paralympics, in 1964, and also hosted in 2021. It hosted three G7 summits in 1979, 1986, and 1993. Tokyo is an international hub of research and development and an academic center, with several major universities, including the University of Tokyo, the top-ranking university in Japan. Tokyo Station is the central hub for the Shinkansen, the country's high-speed railway network, and the city's Shinjuku Station is the world's busiest train station. Tokyo Skytree is the world's tallest tower. The Tokyo Metro Ginza Line, which opened in 1927, is the oldest underground metro line in Asia.
Tokyo's nominal gross domestic output was 120.2 trillion yen (US$887.9 billion) in FY2022 and accounted for 21.2% of Japan's economic output, which converts to 8.43 million yen or US$62,291 per capita. Including the Greater Tokyo Area, Tokyo is the second-largest metropolitan economy in the world after New York, with a 2022 gross metropolitan product estimated at US$2.08 trillion. Although Tokyo's status as a leading global financial hub has diminished with the Lost Decades since the 1990s, when the Tokyo Stock Exchange (TSE) was the world's largest, with a market capitalization about 1.5 times that of the NYSE, Tokyo is still a leading financial hub, and the TSE remains among the world's top five major stock exchanges. Tokyo is categorized as an Alpha+ city by the Globalization and World Cities Research Network. It ranked 14th in the 2024 edition of the Global Livability Ranking, and has been ranked as the safest city in the world by the Economist Intelligence Unit.
Tokyo was originally known as Edo (江戸), a kanji compound of 江 (e, 'cove, inlet') and 戸 (to, 'entrance, gate, door'). The name, which can be translated as "estuary", is a reference to the original settlement's location at the meeting of the Sumida River and Tokyo Bay. During the Meiji Restoration in 1868, the name of the city was changed to Tokyo (東京; from 東 tō 'east', and 京 kyō 'capital'), when it became the new imperial capital, in line with the East Asian tradition of including the word for capital (京) in the name of the capital city (for example, Kyoto (京都), Keijō (京城), Beijing (北京), Nanjing (南京), and Xijing (西京)). During the early Meiji period, the city was sometimes called Tōkei, an alternative pronunciation for the same characters representing "Tokyo", making it a kanji homograph. Some surviving official English documents use the spelling "Tokei"; however, this pronunciation is now obsolete.
The site of Tokyo has been inhabited since ancient times, and there have been multiple Paleolithic period (around 40,000–16,000 BC) sites found in present-day Tokyo. During the subsequent Jomon period, the Holocene glacial retreat caused sea levels in Tokyo Bay to rise by 120 cm, with the coastline running along the edge of what is now the Imperial Palace. Middens such as the Omori Shell Mounds still mark where the coastline ran in those days. The Yayoi period, during which agriculture spread across the country, is named after the Yayoi 2-chōme Site in Bunkyo, where the first example of Yayoi pottery was excavated in 1884 by Shozo Arisaka.
In 534, a large-scale conflict was recorded in the region, as a result of which Kasahara no Omi, the victor, was appointed Kuni no Miyatsuko (provincial governor) by Emperor Ankan. Senso-ji in Asakusa was founded in 645. Under the Ritsuryō system established during the Asuka period, most of present-day Tokyo was part of Musashi Province. Following the fall of the Kingdom of Baekje after the Battle of Baekgang in the 660s, thousands of refugees were resettled in Musashi. During the Heian period, Edo was first fortified by the Edo clan in the late twelfth century, and in 1457, Ōta Dōkan built Edo Castle to defend the region from the Chiba clan. After Dōkan was assassinated in 1486, the Ohgigayatsu branch of the Uesugi clan took control of the castle and the surrounding area. However, the Later Hōjō clan replaced them after the Battle of Takanawahara in 1524, only to be defeated by Toyotomi Hideyoshi during the Siege of Odawara in 1590.
Following the siege of Odawara, Tokugawa Ieyasu was granted the Kantō region and moved there from his ancestral land of Mikawa Province. When he became shōgun, the de facto ruler of the country, in 1603, the whole country came to be ruled by Edo. While the Tokugawa shogunate ruled the country in practice, the Imperial House of Japan based in Kyoto was still the de jure ruler, and the title of shōgun was granted by the Emperor as a formality. During the Edo period, the city enjoyed a prolonged period of peace known as the Pax Tokugawa, and in the presence of such peace, the shogunate adopted a stringent policy of seclusion, which helped to perpetuate the lack of any serious military threat to the city. The absence of war-inflicted devastation allowed Edo to devote the majority of its resources to rebuilding in the wake of consistent fires, earthquakes and other devastating natural disasters, and Edo grew into one of the largest cities in the world with a population reaching one million by the 18th century.
However, this prolonged period of seclusion ended with the arrival of American Commodore Matthew C. Perry in 1853. Commodore Perry forced the opening of the ports of Shimoda and Hakodate, leading to an increase in the demand for new foreign goods and subsequently a severe rise in inflation. Social unrest mounted in the wake of these higher prices and culminated in widespread rebellions and demonstrations, especially in the form of the "smashing" of rice establishments. Meanwhile, supporters of the Emperor leveraged the disruption caused by widespread rebellious demonstrations to further consolidate power, which resulted in the overthrow of the last Tokugawa shōgun, Yoshinobu, in 1867 and the end of the Pax Tokugawa. Despite Edo castle being handed over to the Emperor-supporting forces, some forces loyal to the shogunate kept fighting, ending with the final Battle of Ueno on July 4, 1868.
After being handed over to the Meiji government, Edo was renamed Tokyo (Eastern Capital) on September 3, 1868, and the capital was subsequently moved officially from Kyoto to Tokyo by Emperor Meiji. The former Edo Castle became the new Imperial Palace, and Government ministries such as the Ministry of Finance were relocated to Tokyo by 1871. The 1870s also saw the establishment of other major institutions and facilities such as Ueno Park (1873), the University of Tokyo (1877) and the Tokyo Stock Exchange (1878), as well as the rise of public transportion such as the first railway line in the country, connecting Shimbashi (Shiodome) and Yokohama (Sakuragicho). The rapid modernization of the country was driven from Tokyo, with its business districts such as Marunouchi filled with modern brick buildings and the railway network serving as a means to help the large influx of labour force needed to keep the development of the economy. The City of Tokyo was officially established on May 1, 1889. The Imperial Diet, the national legislature of the country, was established in Tokyo in 1889, and it has ever since been operating in the city.
On September 1, 1923, the Great Kanto Earthquake struck the city, and the earthquake and subsequent fire killed an estimated 105,000 citizens. The loss amounted to 37 percent of the country's economic output. On the other hand, the destruction provided an opportunity to reconsider the planning of the city, which had changed its shape hastily after the Meiji Restoration. The high survival rate of concrete buildings promoted the transition from timber and brick architecture to modern, earthquake-proof construction. The Tokyo Metro Ginza Line portion between Ueno and Asakusa, the first underground railway line built outside Europe and the American continents, was completed on December 30, 1927. Although Tokyo recovered robustly from the earthquake and new cultural and liberal political movements, such as Taishō Democracy, spread, the 1930s saw an economic downturn caused by the Great Depression and major political turmoil. Two attempted military coups d'état happened in Tokyo, the May 15 incident in 1932 and the February 26 incident in 1936. This turmoil eventually allowed the military wings of the government to take control of the country, leading to Japan joining the Second World War as an Axis power. Due to the country's political isolation on the international stage caused by its military aggression in China and the increasingly unstable geopolitical situations in Europe, Тоkуо had to give up hosting the 1940 Summer Olympics in 1938. Rationing started in June 1940 as the nation braced itself for another world war, while the 26th Centenary of the Enthronement of Emperor Jimmu celebrations took place on a grand scale to boost morale and increase the sense of national identity in the same year. On December 7, 1941, Japan attacked the American bases at Pearl Harbor in Hawaii, entering the Second World War against the Allied Powers. The wartime regime greatly affected life in the city.
In 1943, Tokyo City merged with Tokyo Prefecture to form the Tokyo Metropolis (東京都, Tōkyō-to), a reorganization aimed to create a more centralized and efficient administrative structure to better manage resources, urban planning, and civil defence during wartime. The Tokyo Metropolitan Government thus became responsible for both prefectural and city functions while administering cities, towns, and villages in the suburban and rural areas. Although Japan enjoyed significant success in the initial stages of the war and rapid expansion of its sphere of influence, the Doolittle Raid on April 18, 1942, marked the first direct foreign attack on Tokyo. Although the physical damage was minimal, the raid demonstrated the vulnerability of the Japanese mainland to air attacks and boosted American morale.
Large-scale Allied air bombing of cities in the Japanese home islands, including Tokyo, began in late 1944 when the US seized control of the Mariana Islands. From these islands, newly developed long-range B-29 bombers could conduct return journeys. The bombing of Tokyo in 1944 and 1945 is estimated to have killed between 75,000 and 200,000 civilians and left more than half of the city destroyed. The deadliest night of the war came on March 9–10, 1945, the night of the American "Operation Meetinghouse" raid. Nearly 700,000 incendiary bombs were dropped on the east end of the city (Shitamachi, 下町), an area with a high concentration of factories and working-class houses. Two-fifths of the city were completely burned, more than 276,000 buildings were destroyed, 100,000 civilians were killed, and 110,000 more were injured. Numerous Edo and Meiji-era buildings of historical significance were destroyed, including the main building of the Imperial Palace, Sensō-ji, Zōjō-ji, Sengaku-ji and Kabuki-za. Between 1940 and 1945, the population of Tokyo dwindled from 6,700,000 to less than 2,800,000, as soldiers were sent to the front and children were evacuated.
After the war, Tokyo became the base from which the Allied Occupation Forces, under Douglas MacArthur, an American general, administered Japan for six years. The original rebuilding plan of Tokyo was based on a plan modelled after the Metropolitan Green Belt of London, devised in the 1930s but canceled due to the war. However, due to the monetary contraction policy known as the Dodge Line, named after Joseph Dodge, the neoliberal economic advisor to MacArthur, the plan had to be reduced to a minimal one focusing on transport and other infrastructure. In 1947, the 35 pre-war special wards were reorganized into the current 23 wards. Tokyo did not experience fast economic growth until around 1950, when heavy industry output returned to pre-war levels.
Since around the time the Allied occupation of Japan ended in 1952, Tokyo's focus shifted from rebuilding to developing beyond its pre-war stature. From the 1950s onwards, Tokyo's Metro and railway network saw significant expansion, culminating in the launch of the world's first dedicated high-speed railway line, the Shinkansen, between Tokyo and Osaka in 1964. The same year saw the development of other transport infrastructure, such as the Shuto Expressway to meet the increased demand brought about by the 1964 Tokyo Olympics, the first Olympic Games held in Asia. Around this time, the 31-metre height restriction, imposed on all buildings since 1920, was relaxed due to the increased demand for office buildings and advancements in earthquake-proof construction. Starting with the Kasumigaseki Building (147 metres) in 1968, skyscrapers began to dominate Tokyo's skyline. During this period of rapid rebuilding, Tokyo celebrated its 500th anniversary in 1956 and the Ogasawara Islands, which had been under control of the US since the war ended, were returned in 1968. Ryokichi Minobe, a Marxian economist who served as the governor for 12 years starting in 1967, is remembered for his welfare state policy, including free healthcare for the elderly and financial support for households with children, and his 'war against pollution' policy, as well as the large government deficit they caused.
Text from the Wikipedia article “Tokyo”, available under CC BY-SA 4.0.