Motoo, Hinago (1986). Japanese Castles. Tokyo: Kodansha. tr. 111–114. ISBN0-87011-766-1. Motoo, Hinago (1986). Japanese Castles. Tokyo: Kodansha. tr. 111–114. ISBN0-87011-766-1. Motoo, Hinago (1986). Japanese Castles. Tokyo: Kodansha. tr. 111–114. ISBN0-87011-766-1.