However, an iron sword with gold inscription, which was found from Inariyama-kofun Tumulus made in the fifth century, is older, and it has a possible name of the 21st Emperor Yuryaku, 'wa ka ta ke ru daio' (獲加多支鹵大王, the King Wakatakeru), on it.
しかしながらさらに古い5世紀の稲荷山古墳から発見された金錯銘鉄剣には「獲加多支鹵（わかたける）大王」という21代雄略天皇に推定される名が刻まれている。