Book II 233*
This year, Satto,^118 King of Chūzan of the Ryukyu Kingdom, sent a letter
and gifts through a [Korean] interpreter named Yi Sŏn and others, intro-
ducing himself as a vassal of Korea. He also returned eight male and female
Korean captives in their custody.
- Also known as Chadu, he was a king of Chūzan, one of the three kingdoms formerly
on the island of Okinawa. His reign was marked by expansion and development of Chūzan’s
trade relations with other states, including China and Korea. The relations with Korea are
believed to have first been established in 1389 at the end of the Koryŏ period, and they con-
tinued throughout the Chosŏn dynasty, which replaced Koryŏ.