Kokubunji, Tokyo

Kokubunji (国分寺市, Kokubunji-shi) is a city located in the western portion of Tokyo Metropolis, Japan. As of 1 March 2021, the city had an estimated population of 126,791, and a population density of 11,000 persons per km².[1] The total area of the city was 11.46 square kilometres (4.42 sq mi).


Kokubunji City Hall
Kokubunji City Hall
Flag of Kokubunji
Official seal of Kokubunji
Location of Kokubunji in Tokyo
Location of Kokubunji in Tokyo
Kokubunji is located in Japan
Coordinates: 35°42′39.4″N 139°27′43.8″E / 35.710944°N 139.462167°E / 35.710944; 139.462167Coordinates: 35°42′39.4″N 139°27′43.8″E / 35.710944°N 139.462167°E / 35.710944; 139.462167
 • MayorKunio Izawa (since July 2013)
 • Total11.46 km2 (4.42 sq mi)
 (March 2021)
 • Total126,791
 • Density11,000/km2 (29,000/sq mi)
Time zoneUTC+9 (Japan Standard Time)
• TreeZelkova serrata
• FlowerSatsuki azalea
Phone number042-325-0111
Address1-6-1 Tokura, Kokubunji-shi, Tokyo 185-8501
WebsiteOfficial website
ruins of Musashi Kokubun-ji temple


Kokubunji is located on the Musashino Terrace of western Tokyo, approximately in the geographic centre of Tokyo Metropolis. The city extends for about 5.68 kilometers east-to-west by about 3.86 kilometers north-to-south.

Surrounding municipalitiesEdit

Tokyo Metropolis


Kokubunji has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Kokubunji is 14.0 °C. The average annual rainfall is 1647 mm, with September as the wettest month. The temperatures are highest on average in August, at around 25.5 °C, and lowest in January, at around 2.6 °C.[2]


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

Historical population
1920 4,618—    
1930 6,454+39.8%
1940 9,324+44.5%
1950 19,125+105.1%
1960 39,098+104.4%
1970 81,259+107.8%
1980 91,010+12.0%
1990 100,982+11.0%
2000 111,404+10.3%
2010 120,733+8.4%


The area of present-day Kokubunji was part of ancient Musashi Province, and was the site of the Nara period Provincial temple of that province. In the post-Meiji Restoration cadastral reform of 1878, the area became part of Kitatama District in Kanagawa Prefecture. The village of Kokubunji was created on April 1,1889 with the establishment of the modern municipalities system. Kitatama District was transferred to the administrative control of Tokyo Metropolis on April 1, 1893. Kokubunji was elevated to town status in 1940, and to city status on November 3,1964.


Kokubunji has a mayor-council form of government with a directly elected mayor and a unicameral city council of 22 members. Kokubunji, together with the city of Kunitachi, 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.


Kokubunji is the home of the Hitachi Central Research Laboratory, which contains one of the largest natural preserves in the area surrounding Tokyo.[4] The Railway Technical Research Institute, the technical research company under the Japan Railways group of companies is also located in Kokubunji.


Kokubunji has ten public elementary schools and five public middle schools.[5] The city has one public high school, Kokubunji High School, which is operated by the Tokyo Metropolitan Government Board of Education.[6] There is also one private high school, affiliated with Waseda University. Tokyo Keizai University has a campus at Kokubunji.



  JR EastChūō Main Line

  JR EastMusashino Line

  • Nishi-Kokubunji

  Seibu Railway - Seibu Kokubunji Line

  Seibu Railway - Seibu Tamako Line

  • Kokubunji


  • Kokubunji is not served by any national highways or expressways.

Sister city relationsEdit

Local attractionsEdit


  1. ^ "Kokubunji city official statistics" (in Japanese). Japan.
  2. ^ Kokubunji climate data
  3. ^ Kokubunji population statistics
  4. ^ Hitachi Central Research Laboratory website, retrieved 28 January 2013
  5. ^ "Compulsory Education Systems in Japan", Kokubunji official website Archived 2007-08-13 at the Wayback Machine, retrieved 23 June 2008
  6. ^ Tokyo Metropolitan Kokubunji High School website, retrieved 23 June 2008
  7. ^ "International Exchange". List of Affiliation Partners within Prefectures. Council of Local Authorities for International Relations (CLAIR). Archived from the original on 5 March 2016. Retrieved 21 November 2015.

External linksEdit