Ōzato Castle (大里城 Ōzato-jō), officially Shimasoe-Ōzato Castle (島添大里城 Shimasoe Ōzato-jō?), is a Ryūkyūan gusuku built in Nanzan and used until 1429. It, and the village of Ōzato, are named after the Ōzato Dynasty of Nanzan. It is in ruins, and is an officially-designated historical site in Nanjō City, Okinawa.[1]