However, in Battle of Komaki and Nagakute, Kazunari took the side of Ieyasu TOKUGAWA supporting Nobukatsu ODA (the second son of Nobunaga ODA), who was a nephew of his mother and in discord with Hideyoshi due to the successor to his uncle Nobunaga, so that Kazunari who angered Hideyoshi had his territory confiscated and was cut off from Sugen-in.
だが一成が小牧・長久手の戦いで伯父・信長の跡継ぎのことで秀吉と不和になった母の甥・織田信雄（織田信長次男）を擁立した徳川家康に味方したため秀吉の怒りに触れた一成は秀吉から所領を没収されるとともに離縁させられた。