The phrase "amenoshita shiroshimesu □□□□□ okimi" is seen on the iron sword excavated at the Eta Funayama Tumulus, which is believed to have been constructed in the late fifth century, and it is presumed that the portion of □□□□□ can be read as "Wakatakeru," who is assumed to be the Emperor Yuryaku.
5世紀後期の作成とされる江田船山古墳出土の鉄剣銘に「治天下□□□□□大王」とあり、□□□□□の部分は「ワカタケル」と訓ずると推定されており、雄略天皇に比定されている。