Greater Tokyo Area

Inner Tokyo and Tokyo	Details	Population, thousands (year)	Area (km2)	Population density (people/km2)	Map
Area of former (dissolved) Tokyo City limits	23 special wards, does not correspond to any single authority	8,841 (1970CF), 8,135 (2000CF), 8,490 (2005CF), 8,949 (2010CF), 9,256 (2015-12CR)	621.9	13,080 (2000) 14,390 (2010) 14,883 (2015–12)
Tokyo Metropolis	Prefectural-level jurisdiction (Tokyo-to), figures excluding the Izu and Ogasawara islands	12,038 (2000CF), 12,541 (2005CF), 13,129 (2010CF), 13,479 (2015-12CR)	1808	6,658(2000) 6,936 (2005) 7,216.5 (2010) 7,455 (2015–12)

Metropolitan area	Details	Population, thousands (year)	Area (km2)	Population density (people/km2)	Map
Tokyo Metropolitan Employment Area (東京大都市雇用圏, Tōkyō Dai-toshi Koyō-ken)	All municipalities that have at least 10% of their population commuting to the 23 special wards. Figures for this definition are complex to update without a major re-study.	27,106 (1980) 29,958 (1990) 31,730 (2000) 34,834 (2010) 35,304 (2015) [7]	9,036.67 (1998) 10,403.76 (2010) [7]	3,348.2 (2010)
One Metropolis, Three Prefectures (一都三県, Itto Sanken)	Coarse administrative definition that contains Tokyo, Kanagawa, Saitama, and Chiba prefectures. Misses many of the more-distant suburbs that lie outside the prefectural borders, especially in Ibaraki and Gunma. Incorporates sparsely settled rural districts like Nishitama.	33,534 (2000CF), 35,623 (2010CF), 36,092 (2015-12CR)	13,555.65	2,627.9 (2010), 2,662 (2015–12)
Kantō Major Metropolitan Area (関東大都市圏, Kantō Dai-toshi-ken)	One of the two definitions the Japan Statistics Bureau uses. Consists of all municipalities that have at least 1.5% of their population aged 15 and above commuting to a designated city (Chiba, Kawasaki, Sagamihara, Saitama, and Yokohama) or the 23 special wards. Before Saitama became a designated city in 2001, the area was called Keihin'yō Major Metropolitan Area (京浜葉大都市圏, Keihin'yō Dai-toshi-ken). Excludes adjacent metropolitan areas of Gunma, Ibaraki, and Utsunomiya which are urbanized but have some small towns in between them and Tokyo. Most locally detailed definition, but hard to update without major re-study.	36,923 (2010)[8]	–	–
Tokyo Major Metropolitan Area (東京大都市圏, Tōkyō Dai-toshi-ken)	Set of municipalities that are completely or mostly within 50 and 70 kilometres of the Tokyo Metropolitan Government Buildings in Shinjuku. Suburbs tend to extend finger-like along major commuter train routes and density builds along express stops, not in a uniform fashion, and so this definition is of value.	32,714 (<50 km, 2010), 36,303 (<70 km, 2010)[9]	–	–

Administrative area	Details	Population, thousands (year)	Area (km2)	Population density (people/km2)	Map
Kantō region	Entire national region, includes many rural areas	40,550 (2000CF) 42,607 (2010CF) 42,945 (2015-12CR)	32,423.9	1,314.1 (2010)
National Capital Region	According to the National Capital Region Planning Act, very coarse administrative zone, essentially Kantō plus Yamanashi, includes large rural areas.	41,438 (2000CF) 43,470 (2010CF) 43,785 (2015-12CR)	36,889.28	1,178.4 (2010)

Notes and sources: All figures issued by Japan Statistics Bureau,[10][11] except for Metro Employment Area, a study by Center for Spatial Information Service, the University of Tokyo. Abbreviations: CF for National Census Final Data (every 5 years by JSB), CR for Civil Registry (compiled by local governments, monthly as per legal requirement), CP for Census Preliminary.

The National Capital Region (首都圏, Shutoken) of Japan refers to the Greater Tokyo Area as defined by the National Capital Region Planning Act (首都圏整備法, Shutoken-seibi-hō) of 1956, which defines it as "Tokyo and its surrounding area declared by government ordinance."[12] The government ordinance defined it as Tokyo and all six prefectures in the Kantō region plus Yamanashi Prefecture. While this includes all of Greater Tokyo, it also includes sparsely populated mountain areas as well as the far-flung Bonin Islands which are administered under Tokyo.

Using the "One Metropolis Three Prefectures" definition, Tokyo is 13,555.65 square kilometres (5,233.87 sq mi), a similar size to that of Los Angeles County, and almost two-thirds smaller than the combined statistical area of New York City, at 30,671 square kilometres (11,842 sq mi) and 21.9 million people. Other metropolitan areas such as Greater Jakarta are considerably more compact as well as more densely populated than Greater Tokyo.

• The South Kantō region (南関東, Minami Kantō) is a potentially ambiguous term. Informally, it may mean the One Metropolis, Two Prefectures, or the area without Saitama Prefecture. Formally, it may mean the South Kantō Block, which is not the Greater Tokyo Area, but a proportional representation block of the national election, comprising Kanagawa, Chiba, and Yamanashi Prefectures.
• In informal occasions, the term National Capital Region (首都圏, Shuto-ken) often means Greater Tokyo Area. Officially, the term refers to a much larger area, namely the whole Kantō region and Yamanashi Prefecture.
• Tokyo as a metropolis includes some 394 km²
  of islands (the Izu and Ogasawara islands), as well as some mountainous areas to the far west (331 km²
  ), which are officially part of Greater Tokyo, but are wilderness or rustic areas.

Tokyo is legally classified as a to (都), which translates as "metropolis", and is treated as one of the forty-seven prefectures of Japan. The metropolis is administered by the Tokyo Metropolitan Government as a whole.

Special wards of Tokyo

Shibuya

Central Tokyo, situated in the eastern portion of Tokyo Metropolis, was once incorporated as Tokyo City, which was dismantled during World War II. Its subdivisions have been reclassified as special wards (特別区, tokubetsu-ku). The twenty three special wards currently have the legal status of cities, with individual mayors and city councils, and they call themselves "cities" in English. However, when listing Japan's largest cities, Tokyo's twenty three wards are often counted as a single city.

Hachiōji

Western Tokyo, known as the Tama Area (Tama-chiiki 多摩地域) comprises a number of municipalities, including these suburban cities:

Chiba

Kawasaki

Saitama

Yokohama

Kawaguchi

The core cities of the Greater Tokyo Area outside Tokyo Metropolis are:

• Chiba (population 940,000)
• Kawasaki (population 1.36 million)
• Sagamihara (population 730,000)
• Saitama (population 1.19 million)
• Yokohama (population 3.62 million)

The other cities in Chiba, Kanagawa and Saitama Prefectures are:

source: stat.go.jp census 2005

In the major metropolitan area (MMA) definition used by the Japanese Statistics Bureau, the following cities in Ibaraki, Tochigi, Gunma, Yamanashi, and Shizuoka Prefectures are included:

• Tatebayashi

• Atami

• Oyama

• Ōtsuki
• Uenohara

Tighter definitions for Greater Tokyo do not include adjacent metropolitan areas of Numazu-Mishima (approx. 450,000) to the southwest, Maebashi-Takasaki-Ōta-Ashikaga (approx. 1,500,000 people) on the northwest, and Greater Utsunomiya (approx. 1,000,000) to the north. If they are included, Greater Tokyo's population would be around 39 million.Takasaki-Maebashi is included as part of the Tokyo-Yokohama area in the definition of urban areas by Demographia.

Panoramic view of Tokyo from Tokyo Skytree

Sources:[7] Conversion rates – Exchange rates – OECD Data

The Greater Tokyo Area has two major airports, Tokyo International Airport, commonly known as Haneda Airport (once chiefly domestic, now turning international) and Narita International Airport (chiefly international as well). Minor facilities include Chōfu and Ibaraki Airport. Tokyo Heliport serves helicopter traffic, including police, fire, and news. Japan Civil Aviation Bureau handles air traffic in large part but various military facilities handle air traffic in part: Hyakuri Air Base (Japan Air Self-Defense Force), Utsunomiya Air Field (Japan Ground Self-Defense Force), and Yokota Air Base (United States Air Force).[14]

Greater Tokyo has an extensive railway network comprising high-speed rail, commuter rails, subways, monorails, private lines, trams and others. There are around 136 individual rail lines in the Greater Tokyo Area, and between 1,000 and 1,200 railway stations depending on one's definition of the area, most designed for heavy use, usually long enough to accommodate 10-car (200 metres (660 ft) long) trains. Stations are designed to accommodate hundreds of thousands of passengers at any given time, with miles of connecting tunnels linking vast department stores and corporate offices. Tokyo Station has underground connections that stretch well over 4 kilometres (2.5 mi), and Shinjuku Station has well over 200 exits. Greater Tokyo's Railway Network is easily considered the world's largest in terms of both daily passenger throughput with a daily trips of over 40 million (20 million different passengers) as well as physical extent with approximately 2,578 kilometres (1,602 mi) of track. Shinjuku station is used by an average of 3.34 million people per day, making it the world's busiest train station. Some 57 percent of all Greater Tokyo residents used rail as their primary means of transport in 2001.[15]

JR East and many other carriers crisscross the region with a network of rail lines. The most important carriers include Keihin Kyūkō Electric Railway (Keikyū), Keisei Electric Railway, Keiō Electric Railway, Odakyū Electric Railway, Seibu Railway, Tōbu Railway, and Tōkyū Corporation. In addition to Tokyo's two subway systems — Tokyo Metro and Tokyo Metropolitan Bureau of Transportation (Toei and Toden lines), Yokohama also has two subway lines.

The Tokyo Monorail provides an important shuttle service between Haneda Airport and Hammatsucho station on the Yamanote line.

The Shuto Expressway system connects to other national expressways in the capital region.

Tokyo and Yokohama are major commercial seaports, and both the Japan Maritime Self-Defense Force and United States Navy maintain naval bases at Yokosuka.