The rank of IOI no Kujira at the outbreak of the Jinshin War is unknown, however, he was Suke-no-Ikusanokimi when INUKAI no Ikimi, Ikusanokimi (commander) of the army of Otomo no Miko (Emperor Kobun), advanced south to capture Yamato (Yamato Province) the enemy's troops had camped.
壬申の乱勃発時に廬井鯨がどのような地位にあったかは不明だが、大友皇子（弘文天皇）の側の将犬養五十君が倭（大和国）の敵軍に向けて南に進んだとき、その別将であった。