Also, from relative comparisons with historical materials abroad, there is a theory which identifies him with San of the five kings of Wa, who appear in "Sungshu (Book of the Sung dynasty)" and "Book of the Liang dynasty" (in addition, there are theories which identify Nintoku or Richu with San) and a possibility has been pointed out that he might have directed the advancement of Wakoku (Japan) to Korea,which is written in "Gwanggaeto Stele."
また、海外史料との相対比較から、『宋書』や『梁書』に見える倭の五王の讃に比定する説（ほかに仁徳や履中を比定する説もある）、「広開土王碑」に見える倭国の朝鮮進出を指揮した可能性も指摘されている。