Chūzan

Chūzan was the central Okinawan kingdom of the Sanzan period, based at Urasoe. In 1337 the young Seii, son of Tamagusuku, ruled while his mother governed at court.

Around 1350 Satto of Urasoe seized the throne. Ming envoys arrived in 1372, opening a tributary relationship, while Chinese settlers at Kumemura supplied officials and diplomats. Satto's son Bunei succeeded in 1395 and received Ming investiture in 1406. Shō Hashi of Sashiki overthrew Bunei and conquered Hokuzan and Nanzan by 1429, uniting the Ryukyu Kingdom around Chūzan.