Shō Hashi
Modern historians have also struggled to resolve contradictions. Unlike Sai On, Wada Hisanori attached weight to the "Chūzan Seifu". He identified Taromai as the eldest son of Shō Hashi and concluded that the King of Nanzan Taromai was a puppet of Chūzan. According to Wada, Shō Hashi overthrew the King of Nanzan in 1403 and ascended to the throne. He overthrew the King of Chūzan Bunei in 1405 and installed his father Shō Shishō as King of Chūzan. He gave the title of King of Nanzan to his son Taromai in 1415 to become the Crown Prince of Chūzan. He succeeded his father Shō Shishō as King of Chūzan in 1422. After the death of Taromai around 1429, Shō Hashi formally abolished Nanzan. The reason that Shō Hashi nominally maintained Nanzan was that he wished to keep profitable Chinese trade conducted under the name of the King of Nanzan.