On January 5, 1479, Kiyosu-jo Castle was besieged by Toshihiro who was backed by the Saito family of Mino, and all persons in the castle were ready for dying in battle.
同年、12月4日(旧暦)、美濃の斎藤家の後ろ盾を得て、清洲城奪還に乗り出した敏広に清洲城を包囲されると、一時は全員討死の覚悟をした。