This sort of tendency is a striking feature of the Muromachi period; Shogun Yoshinori ASHIKAGA being assassinated by the Akamatsu clan (in the Kakitsu Revolt), Shogun Yoshiki ASHIKAGA being driven from power by Masamoto HOSOKAWA and replaced (in the Meio Coup), and Shogun Yoshiteru ASHIKAGA's assassination by Hisahide MATSUNAGA can all be understood as examples of shukun oshikome (shutting away/ neutralizing their lords) against the Shogunal family.
こうした傾向は室町期に顕著となり、赤松氏による将軍足利義教の殺害（嘉吉の乱）、細川政元による将軍足利義材の廃立（明応の政変）、松永久秀による将軍足利義輝の殺害は、いずれも将軍家に対する主君押込めとして理解することが可能である。