Although Norimune showed the movement of split by supporting a member of the family Suminori ARIMA, he was reconciled with Masanori through the intermediation of Yoshimasa ASHIKAGA as he fell into an awful predicament by the attack of the Yamana clan agitated for this internal conflict.
則宗は一族の有馬澄則を擁立する動きを見せるなど分裂の様相をみせるが、この内紛を突いた山名氏の進撃により窮地に陥った為、足利義政の仲介により政則と和解する。