But in 1379, the Shiba clan launched a coup d'etat, which came to be called the Koryaku Coup, and as a result Yoriyuki HOSOKAWA lost his influence, replaced as Kanrei by Yoshimasa SHIBA.
1379年には斯波氏のクーデターで細川頼之が失脚させられる康暦の政変と呼ばれる政変が起き、後任には斯波義将が就任する。