Although the Akamatsu clan presided over the Uragami clan and had been shugo (military governor) of Harima Province, Bizen Province and Mimasaka Province, it was destroyed because of their role in assassinating the Seii taishogun (literally, "great general who subdues the barbarians") Yoshinori ASHIKAGA in the Kakitsu no ran (Kakitsu War).
浦上氏の主君の赤松氏は播磨国、備前国、美作国の守護だったが嘉吉の乱で征夷大将軍足利義教を暗殺したために滅ぼされていた。