Kōfu (甲府市, Kōfu-shi) is the capital city of Yamanashi Prefecture, Japan. As of 1 April 2019, the city had an estimated population of 187,985 in 90,924 households, and a population density of 880 persons per km2. The total area of the city is 212.41 square kilometres. Kōfu's name means "capital of Kai Province". During the Sengoku period, it was famous as the stronghold of Takeda Shingen.