Sai On
The "Chūzan Seikan" and Sai Taku's edition of the "Chūzan Seifu" follow Chinese sources in that they refer to the supposed polities as , Chūzan and . For some unknown reason, however, Sai On changed the names of Sanhoku and Sannan to and respectively. A world view presented in the "Omoro Sōshi" is strikingly different from that of the history books. The perception that Okinawa was divided into three polities is absent from the poem anthology. It never uses the terms of Sanzan, Sanhoku, Chūzan or Sannan. The King of Hokuzan is referred to as "Nakijin Aji". The supposed King of Nanzan is "Ōzato Aji". Alternatively, he is referred to as . They are no different from other regional rulers.