Nanzan
Nanzan (南山), sometimes called Sannan (山南), was one of three kingdoms which controlled Okinawa in the 14th century. Okinawa, previously controlled by a number of local chieftains or lords, loosely bound by a paramount chieftain or king of the entire island, split into these three more solidly defined kingdoms within a few years after 1314; the Sanzan period thus began, and would end roughly one hundred years later, when Chūzan's King Shō Hashi conquered Hokuzan in 1419 and Nanzan in 1429.
History
Nanzan first came into being in 1314 when Tamagusuku inherited the role of head chieftain of all of Okinawa from his father Eiji; he did not have the charisma or leadership qualities to command the loyalty of all the local lords, and so the Lord of Ōzato, one of many powerful local chieftains, fled south from his home in Urasoe, with a number of lesser chieftains loyal to him, and established himself in Ōzato gusuku near the town of Itoman. Another powerful chieftain fled north and established the kingdom of Hokuzan, leaving Tamagusuku in control only of the central part of the island, which thus became the kingdom of Chūzan.