There is a theory which identifies him with the king of Wa (Japan), whose name was King San, one of the 'five kings of Wa' which appear in "So-jo" (literally, Book of Song [one of the Nanbeichao or the Southern Dynasties of China]), (whereas other theories identify Emperor Ojin or Emperor Nintoku with King San).
中国の『宋書』に見える「倭の五王」中の倭王讃に比定する説がある（応神天皇もしくは仁徳天皇とする説もあり）。