Western Tokyo

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Western Tokyo
Located in the green highlights
Located in the green highlights
Country Japan
Island Honshū
Region Kantō
Prefecture Tokyo
 • 26 cities, 3 towns, 1 village 1,169.49 km2 (451.54 sq mi)
Population (May 1, 2015)
 • 26 cities, 3 towns, 1 village 4,220,989
 • Density 3,609.25/km2 (9,347.9/sq mi)

Western Tokyo, also known as the Tama area (多摩地域 Tama chiiki?), Tama region (多摩地方 Tama-chihō?) or toka (都下?), consists of the part of Tokyo Prefecture to the west of the 23 special wards.


Whereas the special wards occupy the space that was formerly the city of Tokyo, western Tokyo consists of the 26 cities, three towns, and one village occupying the area that were not part of the former city.

List of cities, towns and a village

Flag Name Japanese Population
(as of May 2015)
Flag of Akiruno, Tokyo.svg Akiruno あきる野市 80,620 1,100 73.47
Flag of Akishima, Tokyo.svg Akishima 昭島市 111,589 6,440 17.34
Flag of Chofu, Tokyo.svg Chōfu 調布市 227,396 10,540 21.58
Flag of Fuchu, Tokyo.svg Fuchū 府中市 260,988 8,870 29.43
Flag of Fussa, Tokyo.svg Fussa 福生市 58,375 5,750 10.16
Flag of Hachioji, Tokyo.svg Hachiōji 八王子市 579,405 3,110 186.38
Flag of Hamura, Tokyo.svg Hamura 羽村市 55,840 5,640 9.90
Flag of Higashikurume, Tokyo.svg Higashikurume 東久留米市 116,779 9,070 12.88
Flag of Higashimurayama, Tokyo.svg Higashimurayama 東村山市 151,500 8,840 17.14
Flag of Higashiyamato Tokyo.svg Higashiyamato 東大和市 85,313 6,360 13.42
Flag of Hino, Tokyo.svg Hino 日野市 184,770 6,710 27.55
Flag of Hinode, Tokyo.svg Hinode 日の出町 17,201 613 28.07
Flag of Hinohara, Tokyo.svg Hinohara 檜原村 2,228 21.1 105.41
Flag of Inagi, Tokyo.svg Inagi 稲城市 87,534 4,870 17.97
Flag of Kiyose Tokyo.svg Kiyose 清瀬市 74,345 7,270 10.23
Flag of Kodaira, Tokyo.svg Kodaira 小平市 190,945 9,310 20.51
Flag of Koganei, Tokyo.svg Koganei 小金井市 121,369 10,740 11.30
Flag of Kokubunji, Tokyo.svg Kokubunji 国分寺市 122,634 10,700 11.46
Flag of Komae, Tokyo.svg Komae 狛江市 81,021 12,680 6.39
Flag of Kunitachi Tokyo.svg Kunitachi 国立市 75,586 9,270 8.15
50px Machida 町田市 429,378 5,980 71.80
Flag of Mitaka, Tokyo.svg Mitaka 三鷹市 189,115 11,520 16.42
Flag of Mizuho, Tokyo.svg Mizuho 瑞穂町 32,934 1,950 16.85
Flag of Musashimurayama, Tokyo.svg Musashimurayama 武蔵村山市 70,583 4,610 15.32
Flag of Musashino, Tokyo.svg Musashino 武蔵野市 143,678 13,090 10.98
Flag of Nishitokyo, Tokyo.svg Nishitōkyō 西東京市 199,864 12,690 15.75
Flag of Okutama, Tokyo.svg Okutama 奥多摩町 5,288 23.4 225.53
Flag of Ome, Tokyo.svg Ome 青梅市 136,434 1,320 103.31
Flag of Tachikawa, Tokyo.svg Tachikawa 立川市 180,422 7,410 24.36
Flag of Tama, Tokyo.svg Tama 多摩市 147,855 7,040 21.01
Overall 4,220,989 3,609 1,169.49

The towns of Hinode, Mizuho, Okutama, and the village of Hinohara lie in Nishitama District.

The offshore islands of Tokyo (including the Bonin, Volcano, Izu island chains, and the uninhabited islands of Okinotorishima and Minamitorishima) are not considered part of Western Tokyo.


Under the Ritsuryō system, Western Tokyo was part of Musashi Province. The provincial capital was at Fuchū. The provincial temple (kokubunji) was at Kokubunji and the principal shrine (ichinomiya) was at Tama.

Western Tokyo previously consisted of three districts:

  • Nishi-Tama District (西多摩郡 Nishi-Tama-gun?) (lit. "Western Tama") encompassed the present-day cities of Akiruno, Fussa, Hamura, and Ōme; in addition to the four municipalities (3 towns and a village) that still remain a part of the district.
  • Minami-Tama District (南多摩郡 Minami-Tama-gun?) (lit. "Southern Tama") covered the area now occupied by Hachiōji, Hino, Inagi, Tama, and Machida. With the formation of Inagi (the last city to be created in Tokyo in 1971), Minamitama District ceased to exist.
  • Kita-Tama District (北多摩郡 Kita-Tama-gun?) (lit. "Northern Tama") consisted of the locations of the present-day cities of Akishima, Chōfu, Fuchū, Higashikurume, Higashimurayama, Higashiyamato, Kiyose, Kodaira, Koganei, Kokubunji, Komae, Kunitachi, Mitaka, Musashimurayama, Musashino, Nishitokyo, and Tachikawa, as well as some land now in Setagaya. With the establishment of the city of Musashimurayama in 1970, Kitatama District ceased to exist.