Kosai, Shizuoka

Kosai
湖西市
Kosai City Hall
Location of Kosai in Shizuoka Prefecture
Kosai
 
Coordinates: 34°43′6.4″N 137°31′53.8″E / 34.718444°N 137.531611°E / 34.718444; 137.531611
CountryJapan
RegionChūbu (Tōkai)
PrefectureShizuoka
Government
  - MayorHiroyuki Tanai
Area
  Total
86.56 km2 (33.42 sq mi)
Population
 (October 2020)
  Total
57,885
  Density670/km2 (1,700/sq mi)
Time zoneUTC+9 (Japan Standard Time)
- TreeJapanese black pine
- FlowerCommon Gardenia
Phone number053-576-1111
Address3268 Kibi, Kosai-shi, Shizuoka-ken 431-0492
WebsiteOfficial website

Kosai (湖西市, Kosai-shi) is a city located in far western Shizuoka Prefecture, Japan. As of 30 June 2019, the city had an estimated population of 57,885 in 24,232 households, and a population density of 668.7 persons per km2. The total area of the city is 85.65 square kilometres (33.07 sq mi).