Under Kokoku Shikan (emperor-centered historiography which is based on state Shinto), all Japanese shared a common sense that it was taboo to present a doubtful comment about content of the kiki (Kojiki ["A Record of an Ancient Matter"] and Nihonshoki ["Chronicles of Japan"]) and that the existence of Empress Jingu was a historical fact.
また、皇国史観の下、記紀の記述に疑義を呈することはタブー視され、神功皇后の存在も史実とされた。