Due to some views in modern historical studies that deny what is believed to be his achievements or historical sources about him, some consider that the image of Shotoku Taishi described in the documents like "Nihonshoki" is fiction, while they approve of the existence of Umayado no Miko.
近年の歴史学研究において、太子の事績と言われてきたことや資料を否定する研究があることから、厩戸皇子の存在は認めるものの、『日本書紀』等の伝える聖徳太子像を虚構とする説もある。