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Nishitōkyō City Hall
Nishitōkyō City Hall
Flag of Nishitōkyō
Official seal of Nishitōkyō
Location of Nishitōkyō in Tokyo
Location of Nishitōkyō in Tokyo
Nishitōkyō is located in Japan
Coordinates: 35°43′32.2″N 139°32′17.7″E / 35.725611°N 139.538250°E / 35.725611; 139.538250Coordinates: 35°43′32.2″N 139°32′17.7″E / 35.725611°N 139.538250°E / 35.725611; 139.538250
 • Total15.75 km2 (6.08 sq mi)
 (January 2021)
 • Total206,047
 • Density13,000/km2 (34,000/sq mi)
Time zoneUTC+9 (Japan Standard Time)
• TreeZelkova serrata & Cornus florida
• FlowerAzalea, Sunflower, Cosmos, Narcissus
Phone number042-464-1311
Address5-6-13 Minami-machi, Nishitōkyō-shi, Tokyo 188-8666
WebsiteOfficial website

Nishitōkyō (西東京市, Nishitōkyō-shi) (Japanese pronunciation: [ɲiɕi̥toꜜːkʲoː]) is a city located in the western portion of Tokyo Metropolis, Japan. As of 1 January 2021, the city had an estimated population of 206,047, and a population density of 13,000 persons per km2.[1] The total area of the city is 15.75 square kilometres (6.08 sq mi)..


Nishitokyo is located at the centre of the geological/geographical region known as the Musashino Terrace, and is covered with the Kantō loam formation. The city has a good water supply, owing to rivers running through the city - the Shakujii River, Shirako River, Shin River (tributary of Shirako River) and Tamagawa Josui River. From east to west, the city is about 4.8 km, and from south to north is about 5.6 km.


  • former city of Hoya
Fuji-machi, Hibarigaoka, Higashi-cho, Higashi-fushimi, Hoya-cho, Izumi-cho, Kita-machi, Naka-machi, Sakae-cho, Shimo-hoya, Shin-machi, Sumiyoshi-cho, Yagisawa
  • former city of Tanashi
Kitahara-cho, Midori-cho, Minami-cho, Mukodai-cho, Nishihara-cho, Shibakubo-cho, Tanashi-cho, Yato-cho

Surrounding municipalities[edit]

Tokyo Metropolis

Saitama Prefecture


Nishitōkyō has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Nishitōkyō is 14.5 °C. The average annual rainfall is 1648 mm with September as the wettest month. The temperatures are highest on average in August, at around 26.0 °C, and lowest in January, at around 3.1 °C.[2]


Per Japanese census data,[3] the population of Nishitōkyō increased rapidly in the 1950s and 1960s.

Historical population
1920 6,723—    
1930 8,972+33.5%
1940 10,977+22.3%
1950 28,343+158.2%
1960 78,091+175.5%
1970 144,660+85.2%
1980 158,235+9.4%
1990 170,290+7.6%
2000 180,885+6.2%
2010 196,494+8.6%


The area of present-day Nishitōkyō was part of ancient Musashi Province. In the post-Meiji Restoration cadastral reform of July 22, 1878, the area became part of Kitadachi District in Saitama Prefecture. The villages of Hoya and Tanashi were created on April 1, 1889 with the establishment of modern municipalities system. The southern portion of Kitaadachi District was transferred to the administrative control of Tokyo Metropolis on April 1, 1907.

The city of Nishitōkyō was established on January 21, 2001 by the merger of the cities of Hoya and Tanashi. The name Nishitōkyō means "West Tokyo."


Nishitōkyō has a mayor-council form of government with a directly elected mayor and a unicameral city council of 28 members. Nishitōkyō contributes two members to the Tokyo Metropolitan Assembly. In terms of national politics, the city is part of Tokyo 19th district of the lower house of the Diet of Japan.


The watch manufacturer Citizen is headquartered in Nishitōkyō. The animation studio Shin-Ei Animation is also located here.


Universities and colleges[edit]

Primary and secondary education[edit]



SeibuRailway mark.svg Seibu RailwaySeibu Ikebukuro Line

SeibuRailway mark.svg Seibu RailwaySeibu Shinjuku Line


  • Nishitōkyō is not served by any national expressways or national highways

Notable people from Nishitōkyō, Tokyo[edit]


  1. ^ "Nishitōkyō city official statistics" (in Japanese). Japan.
  2. ^ Nishitōkyō climate data
  3. ^ Nishitōkyō population statistics

External links[edit]