While Omi no Kenu was still en route, however, Iwai, the hereditary governor of Tsukushi Province, rebelled and joined forces with Silla, seeking to impede Omi no Kenu's military advance, and consequently Omi no Kenu was unable to cross over into the Korean peninsula.
しかし、その途中に筑紫国国造の磐井の乱が新羅と組んで毛野の進軍を妨害しようとしたため、渡海できなかった。