Sai On
The "Chūzan Seikan" (1650) and Sai Taku's edition of the "Chūzan Seifu" (1701) made no mention of Ōōso, suggesting that the name of Ōōso was not transmitted among the Okinawan society. Sai On's edition of the "Chūzan Seifu" (1725) drastically rewrote history. Having access to Chinese diplomatic records, he added the records of tributary missions sent under the name of Ōōso. Sai On dated Ōōso's death to 1414.