Therefore, it is suspected that the titles for the seventh, eighth and ninth emperors were made with reference to the titles of the existent emperors in the later period when the compilation of the Kojiki and Nihonshoki was in the final stage.
このことは、7,8,9代の天皇の称号を、後世の『記・紀』編纂最終段階に存在した天皇の称号に似せて造作したのではないかという疑義が提出されている。