However, when Yoshimasa ASHIKAGA, the eighth shogun of the Ashikaga shogunate, and Katsumoto tried to support the Akamatsu clan, which had fallen in the Kakitsu Incident, Mochitoyo, who was in charge of the former Akamatsu clan territories, strongly opposed rebuilding the Akamatsu clan.
しかし第8代将軍・足利義政や勝元が嘉吉の乱で没落した赤松氏の足利義政を支援しようとすると、赤松氏の旧領を守護国に持つ持豊は赤松氏の再興に強硬に反対した。