Kofu Castle Ruins is located at the Kofu City, the capital of the Yamanashi prefecture.The construction of the 400 years old Kofu Castle was ordered by the general and politician Toyotomi Hideyoshi after the fall of the feudal Takeda clan beginning in 1583. After the Battle of Sekigahara which established the Tokugawa Shogunate, the Kofu Castle was then controlled by the Tokugawa family.