During the time of Yukinaga MIYOSHI, the Miyoshi clan had the opportunity to expand their power to the Kinai region when they served Shogunal Deputy Katsumoto HOSOKAWA and Masamoto HOSOKAWA and gained power.
三好之長の時代に管領・細川勝元、細川政元に仕えて勢力を拡大したのが畿内進出の契機となる。