이세 국
The original Kameyama Castle was founded by Seki Sanetada in 1264 to the west of the present Kameyama Castle, and was one of the five fortifications guarding the clan domains in northern Ise Province. It came under occasional attack by the Oda clan to the north, and was overrun when Oda Nobunaga extended his authority over Ise Province. In 1583, Hideyoshi defeat Takigawa Kazumasu at Kameyama castle. When Seki Kazumasa was relocated to Shirakawa in 1590, Okamoto Munenori, a retainer of Toyotomi Hideyoshi was given control of the castle. Okamoto moved the castle to the southeast and reconstructed all the main structures.