Shō Hashi
The Three-Kingdom period, also known as the (Three Mountains), lasted from 1322 until 1429. There was a gradual consolidation of power under the Shō family. Shō Hashi (1372–1439) conquered Chūzan, the middle kingdom, in 1404 and made his father, Shō Shishō, the king. He conquered Hokuzan, the northern kingdom, in 1416 and conquered the southern kingdom, Nanzan, in 1429, thereby unifying the three kingdoms into a single Ryukyu Kingdom. Shō Hashi was then recognized as the ruler of the Ryukyu Kingdom (or Liuqiu Kingdom in Chinese) by the Ming dynasty Emperor of China, who presented him a red lacquerware plaque known as the Chūzan Tablet. Although independent, the kings of the Ryukyu Kingdom paid tribute to the rulers of China.