Sai On
Sai On's edition of "Chūzan Seifu" (1725) is drastically different from these two books. Having access to Chinese diplomatic records, Sai On added the records of tributary missions sent under the name of King Taromai. The last king was now identified as Taromai. More importantly, Sai On changed the date of the King of Sannan's downfall to 1429, postdating Shō Hashi's conquest of the King of Chūzan in 1406 and that of the King of Sanhoku in 1416. Sai On naïvely inferred that the King of Sannan was removed immediately after the last tributary mission of 1429.