The influence of the Imagawa clan over Mikawa Province decreased after the Battle of Okehazama, then he became affiliated with Ieyasu TOKUGAWA and participated in Totomi no kuni Kakegawa-jo zeme (assault on Kakegawa-jo Castle at the Totomi Province).
桶狭間の戦い後に三河における今川氏の影響力が後退すると、徳川家康の傘下となり遠江国掛川城攻めに加わった。