Hideo SUZUKI has pointed out the following; after the defeat at the Battle of Hakusukinoe, the vision to see Silla as a 'barbarian country' by the Japanese nation under the ritsuryo codes in the eighth century exaggerated the fact that 'Japanese followers of Alla' were controlled by King Baekje and that the dispatched army of the Yamato Dynasty was a kind of 'mercenary' of Baekje, and as a result, the historical idea centering on the existence of a 'Japanese government at Minama' and the subordinance of Baekje and 'Minama' which were '官家' of the Yamato Dynasty was established when "Ninhonshoki" was compiled.
鈴木英夫は『日本書紀』編纂時に白村江の敗戦を契機とする八世紀代律令国家の新羅「蕃国」視によって、「在安羅諸倭臣」は百済王の統制に服し、倭王権の派遣軍は百済の「傭兵」的性格を帯びていたという事実が誇張・拡大されて「任那日本府」の存在や倭王権の「官家」たる百済・「任那」の従属を核とする内容の史的構想が成立したと指摘する。