From the above, there are some theories that are negative about the parent-child relationship between Emperor Keiko and Yamato Takeru no Mikoto (such as those of Iwao YOSHII and Masao SUGANO).
このことから景行天皇と日本武尊の親子関係について否定的な見解が示されている（吉井巌、菅野雅雄など）。