, read variously as à Âzato, Ofosato, and Ufusatu, was a local ruler of Okinawa Island who was given the title of King of Sannan. Contemporary sources on Shà Âsatto are very scarce. Following a visit of a Chinese envoy to Okinawa Island, he first sent a tributary mission in 1380. His last contact was in 1396. His "reign" deviated too much from the ideological ideal. Only the "king" should have a tributary relationship with the Chinese emperor, but the "King's father's younger brother" (çÂÂÃ¥ÂÂ) à Âeishi also sent envoys from 1388 to 1397. In 1403, à Âà Âso, who claimed to be Shà Âsatto's younger brother or cousin, reported Shà Âsatto's death in 1403 and was recognized as King of Sannan the next year.
His real name is unknown. Modern attempts to decipher the enigmatic un-Okinawan name Shà Âsatto point to à Âzato (大éÂÂ), a toponym with multiple referents. There were two candidates in southern Okinawa: Shimasoe-à Âzato in modern-day Nanjà  City and Shimajiri-à Âzato in modern-day Itoman City.
The Annals of the Joseon Dynasty of Korea record mysterious events about the King of Sannan. In 1394, Satto, King of Chà «zan, requested Korea to return Shà Âsatto, Prince of Sannan (å±±åÂÂçÂÂÃ¥ÂÂæ¿å¯Â度), who had supposedly fled to Korea. In 1398, Onsadà Â, King of Sannan (å±±åÂÂçÂÂ温æ²ÂéÂÂ), fled to Korea after reportedly being banished by the King of Chà «zan. He died there in the same year. These records contradict the Veritable Records, raising questions about the reliability of Okinawa's diplomatic correspondence with foreign countries.
Historian Ikuta Shigeru speculates that the King of Sannan was a puppet of the King of Chà «zan from the very beginning. He re-interpretes the phrase "Prince of Sannan" (å±±åÂÂçÂÂÃ¥ÂÂ) as a title given by the King of Chà «zan to his senior retainer, possibly his blood relative. Historian Wada Hisanori criticized Ikuta's hypothesis, arguing that the King of Chà «zan's subjugation of the King of Sannan began later, during the reign of King à Âà Âso.
The Chà «zan Seikan (1650), Ryà «kyà «'s first official history book, identified the King of Sannan as the Aji of à Âzato. The Chà «zan Seikan only made a single reference to Shà Âsatto: It claimed that Shà Âsatto, King of Sannan, together with the Kings of Chà «zan and Sanhoku, paid tribute to the Chinese emperor for the first time in 1372. This statement contradicts Chinese records, which dated the first mission to 1380. Sai Taku's edition of the Chà «zan Seifu (1701) generally followed the Chà «zan Seikan, but Sai On's edition of the Chà «zan Seifu (1725) drastically rewrote history. Having access to Chinese diplomatic records, he added the records of tributary missions sent under the name of Shà Âsatto. Sai On naïvely inferred that Shà Âsatto died in 1403, the year à Âà Âso reported his death to the Chinese emperor.