Even during the time of peace, he busied himself with the reinforcement of army against his own imagined enemy, Owari Domain; however, this led him confront with his legitimate child, Tadaharu, who was against this.
太平の世にありながら尾張藩を仮想敵国とした軍備の強化に奔走し、そのことを巡り嫡子忠春と対立した。