Shō Hashi
Similarly, historian Wada Hisanori suspects that Ōōso was not a younger brother or cousin of King Shōsatto and that it was a made-up story to eliminate Chinese suspicion. Based on the assumption that by that time, Shō Hashi, the unifier of Okinawa Island, had already kept Sannan under his control, Wada claims that Ōōso was either a pseudonym of Shō Hashi or his puppet ruler.