In the Jinshin War of 672, INA no Iwasuki was chosen as a messenger to mobilize troops for Otomo no Oji (Prince Otomo, who later became Emperor Kobun) from eastern provinces, but failed to complete the mission because he run away when the enemy blocked his way.
672年の壬申の乱で大友皇子（弘文天皇）のために東国から兵力を動員する使者になったが、敵に阻まれて逃げ、任務に失敗した。