However, Oyama insists that the figure of Shotoku Taishi, who achieved various well known things as Prince Regent during the reign of Empress Suiko, was a fictitious character created by FUJIWARA no Fuhito, an influential man during the period when "Nihonshoki" was compiled.
しかし、推古天皇の皇太子かつ摂政として、知られる数々の業績を上げた聖徳太子は、『日本書紀』編纂当時の実力者であった、藤原不比等らの創作であり、架空の存在であるとする。