He contributed to suppressing the Meitoku War that occurred in the wake of the internal conflict of the Yamana clan in 1391, and made efforts for the unification of Southern and Northern Courts by meditating between the Muromachi bakufu and the Southern Court in 1392.
また、1391年に山名氏の内紛からはじまる明徳の乱の鎮圧や1392年には南朝との仲介を行い南北朝合一にも尽力した。