The Yamana clan that had lost much of their power by being defeated in the Meitoku War in the age of Yoshimitsu ASHIKAGA recovered their position and competed their power with the kanrei, the Hosokawa clan.
足利義満時代の明徳の乱で敗れて勢力を低下させた山名氏は大きく回復し、管領細川氏と力を競うようになる。