| When the Sho clan, the royal family of Chuzan (the middle mountain), unified the Sanzan (Three Mountains) and established the Ryukyu Kingdom in 1492, they received an official seal from the Ming court of China. |
1492年に中山王尚氏が三山を統一して琉球王国を建国すると、明朝の冊封を受けた。 |