As it is written 'the King of Wa Suishora' in the Record of Emperor An, it is possible to think that the King of Wa was not a toparchy of the region, but was a 'King of Wa' as a chief of several regional nations, and this is thought to be the establishment of Wakoku (country of Wa).
安帝紀に「倭国王帥升等」とあるように、倭国王は地域の小国家ではなく、いくつかの地域国家連合の首長としての「倭国の王」と考えることができ、これは倭国の成立を示すものではないかとされる。