Akinao, who began the first battle of the revolt, raised an army in Owari Province during the Oei War, in response to the movement of Yoshihiro OUCHI, and fought in Mino Province only to lose the battle to Yorimasu TOKI, the shugo of the province.
乱の発端となった詮直は応永の乱の時に大内義弘に呼応して尾張国で挙兵して美濃国へ討ち入り、美濃守護の土岐頼益に敗れている。