Yoshihiro OUCHI, who succeeded Hiroyo OUCHI, took part in a campaign by Sadayo IMAGAWA (Ryoshun) to subdue Kyushu, also played a reconciliatory role in the unification of Southern and Northern Courts, and took an active part in the Meitoku War, a rebellion by Yamana clan in 1391.
大内弘世の跡を継いだ大内義弘は、今川貞世（了俊）の九州制圧に従軍し、南朝との南北朝合一でも仲介を務め、明徳2年（1391年）には山名氏の反乱である明徳の乱でも活躍した。