Kōfu (甲府市, Kōfu-shi) is the capital city of Yamanashi Prefecture in Japan.
As of November 1, 2015, the city had an estimated population of 193,127 and a population density of 909 persons per km2. The total area was 212.41 square kilometres (82.01 sq mi). Kōfu's name means "capital of Kai Province". During the Sengoku period, it was famous as the stronghold of Takeda Shingen.
Kōfu is located in north-central Yamanashi Prefecture, extending from the northern border of the prefecture with Nagano Prefecture, south until it almost reaches the southern border of the prefecture. It is narrow along its east-west axis. The city bisects the Kofu Basin, and is at an elevation of between 250 and 300 meters, surrounded by mountains on all sides. Much of the northern portion of the city is within the borders of the Chichibu-Tama-Kai National Park