He is identified with the king of Wa (supposedly, Japan), King Sai, of the five kings of Wa, described in the Chinese history books, "So-jo" (which is known as "Sung-shu" in Chinese or the Book of Song [one of the Southern Dynasties of China]) and "Ryo-jo" (known as "Liang-shu" in Chinese or the Book of Liang).
中国の歴史書『宋書』・『梁書』に記される倭の五王中の倭王済に比定されている。