Western Tokyo should not be confused with Nishitōkyō.
| Western Tokyo | |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type2: | Region |
| Subdivision Name2: | Kantō |
| Subdivision Type1: | Island |
| Subdivision Name1: | Honshū |
| Subdivision Type3: | Prefecture |
| Subdivision Name3: | Tokyo |
| Area Total Km2: | 1160 |
| Population As Of: | October 1, 2018 |
| Population Total: | 4233493 |
| Population Density Km2: | auto |
Western Tokyo, known as the, or locally, in the Tokyo Metropolis consists of 30 ordinary municipalities (cities (市 shi), towns (町 machi) and one village (村 mura)), unlike the eastern part which consists of 23 special wards.[1]
Before it was transferred to Tokyo in 1893, the Tama area, then also still often referred to as the (referring to the West, North and South Tama counties it consisted of) had formed the Northern part of Kanagawa Prefecture.[2]
Whereas in the east of Tokyo Metropolis the 23 special wards occupy the area that was formerly Tokyo City, the west consists of 30 other ordinary municipalities: cities (Nos. 1–26), towns (Nos. 27, 28, 30) and a village (No. 29).
| No. | Flag | Name | Japanese (kanji) | Hiragana | Population | Density | Area | |
|---|---|---|---|---|---|---|---|---|
| 1 | 八王子市 | はちおうじし | ||||||
| 2 | 立川市 | たちかわし | ||||||
| 3 | 武蔵野市 | むさしのし | ||||||
| 4 | 三鷹市 | みたかし | ||||||
| 5 | 青梅市 | おうめし | ||||||
| 6 | 府中市 | ふちゅうし | ||||||
| 7 | 昭島市 | あきしまし | ||||||
| 8 | 調布市 | ちょうふし | ||||||
| 9 | 町田市 | まちだし | ||||||
| 10 | 小金井市 | こがねいし | ||||||
| 11 | 小平市 | こだいらし | ||||||
| 12 | 日野市 | ひのし | ||||||
| 13 | 東村山市 | ひがしむらやまし | ||||||
| 14 | 国分寺市 | こくぶんじし | ||||||
| 15 | 国立市 | くにたちし | ||||||
| 16 | 福生市 | ふっさし | ||||||
| 17 | 狛江市 | こまえし | ||||||
| 18 | 東大和市 | ひがしやまとし | ||||||
| 19 | 清瀬市 | きよせし | ||||||
| 20 | 東久留米市 | ひがしくるめし | ||||||
| 21 | 武蔵村山市 | むさしむらやまし | ||||||
| 22 | 多摩市 | たまし | ||||||
| 23 | 稲城市 | いなぎし | ||||||
| 24 | 羽村市 | はむらし | ||||||
| 25 | あきる野市 | あきるのし | ||||||
| 26 | 西東京市 | にしとうきょうし | ||||||
| 27 | 瑞穂町 | みずほまち | ||||||
| 28 | 日の出町 | ひのでまち | ||||||
| 29 | 檜原村 | ひのはらむら | ||||||
| 30 | 奥多摩町 | おくたままち | ||||||
| Overall: | ||||||||
The towns of Hinode, Mizuho, and Okutama, and the village of Hinohara make up the non-contiguous 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: