Also there is a popular theory to prove his power by deciphering the inscriptions on the iron sword inlaid with silver (excavated from the Eta Funayama Tumulus (Nagomi Town, Tamana County, Kumamoto Prefecture)) and the iron sword with gold inscription (excavated from the Inariyama-kofun Tumulus (Gyoda City, Saitama Prefecture)) as 'Wakatakeru no Okimi (the Great King Wakatakeru).'
熊本県玉名郡和水町の江田船山古墳出土の銀象嵌鉄刀銘や埼玉県行田市の稲荷山古墳出土の金錯銘鉄剣銘を「獲加多支鹵大王(ヤマト王権)」と解しその証とする説が有力である。