During the early Muromachi period, political fights occurred frequently among powerful shugo even within the bakufu government, in addition to activities of various powers including that of the Southern Dynasty (in Japan), and Yoriyuki HOSOKAWA, deputy to shogun, lost his position in Coup of Koryaku in 1379.
室町時代の初期には南朝(日本)や諸勢力の活動をはじめ、幕府内部でも有力守護の政争が絶えず、1379年(康暦元/天授(日本)5)には康暦の政変で管領の細川頼之が失脚している。