|• Total||10.23 km2 (3.95 sq mi)|
|• Density||7,300/km2 (19,000/sq mi)|
|Time zone||UTC+9 (Japan Standard Time)|
|- Tree||Zelkova serrata|
|- Flower||Camellia sasanqua|
|- Bird||Azure-winged magpie|
|Address||5-842 Nakasato, Kiyose-shi, Tokyo-to 204-8511|
Kiyose (清瀬市, Kiyose-shi) is a city located in Tokyo Metropolis, Japan. As of 1 April 2021[update], the city had an estimated population of 74,972 in 36,376 households, and a population density of 7300 persons per km2. The total area of the city was 10.23 square kilometres (3.95 sq mi).
Kiyose City is roughly in the shape of a wedge, bordered by Saitama Prefecture to the north, east and south and separated from the city of Tokorozawa by the Yanase River. The city has considerable green space, with around 46% of its area remaining rural.
Kiyose is located on a flat tableland about 15 km from the northeastern edge of Musashino Plateau. The city measures approximately 6.5 km northeast to southwest and 2 km northwest to southeast, with the west side slightly higher than the east. Average altitude above sea level ranges from 65 meters at Takeoka in the west to 20 meters at Shitajuku in the northeastern side. The city area is mostly diluvial soil except for a small area of alluvial soil by Yanase River, which runs on the edge of the region.
Kiyose has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Kiyose 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 25.7 °C, and lowest in January, at around 2.3 °C.
Per Japanese census data, the population of Kiyose increased rapidly in the 1950s and 1960s with the development of many large-scale public housing projects.
Archaeologists have found evidence of human settlement in the Kiyose area dating from over 20 thousand years ago, during the last glacial maximum. During the Muromachi period, the area came under the control of Oishi Nobushige (大石 信重) from Saku in Shinano Province (now Nagano Prefecture). The Oishi clan constructed Taki-no-Jo Castle, but it was lost during battles with Toyotomi Hideyoshi.
The village of Kiyose was created within Kitatama District, Kanagawa by the merger of the hamlets of Kamikiyoto (上清戸), Nakakiyoto (中清戸), Shimokiyoto (下清戸), Kiyotoshitajuku (清戸下宿), Nakazato (中里), and Noshio (野塩) with the establishment of the modern municipalities system on April 1, 1889. In 1893, Kitatama was transferred from Kanagawa Prefecture to Tokyo. In 1954, Kiyose was elevated to town statu and to city status on October 1, 1970.
Kiyose was noted for many sanatoria for tuberculosis patients. Whilst the incidence of the disease has greatly decreased, the city still has the second-most hospital beds after Chiyoda Ward.
Kiyose has a mayor-council form of government with a directly elected mayor and a unicameral city council of 20 members. Kiyose, together with Higashikurume, contributes two members to the Tokyo Metropolitan Assembly. In terms of national politics, the city is part of Tokyo 20th district of the lower house of the Diet of Japan.
Kiyose is largely a bedroom community, with over a third of its workforce commuting to central Tokyo every day. However, approximately 40% of the city's land area remains classified as agricultural, with spinach and carrots as the main crops.
Kiyose is not served by any national highways.