Maizuru Castle Park is a park and historical site in Kofu, Yamanashi, Japan. It contains the ruins of Kōfu Castle (甲府城 Kōfu-jō), also called Maizuru Castle, which is about 400 years old and has been designated as a Yamanashi Historical Site. Maizuru Castle Park is a place of rest and relaxation for the people of Yamanashi Prefecture.