Nakijin Castle is a Ryukyuan gusuku located in Nakijin, Okinawa. It is currently in ruins. In the late 14th century, the island of Okinawa consisted of three principalities: Nanzan to the south, Chūzan in the central area, and Hokuzan in the north. Nakijin was the capital of Hokuzan. The fortress includes several sacred Utaki groves, reflecting the castle's role as a center of religious activity.