Because of that, Yoshimune was a nominal monarchy and it is said that the relationship with his father, Sorin, was not good around 1580, and the reason why the Otomo clan was one-sidedly pushed by the Shimazu clan invasion was not only for losing the war at the battle of Mimikawa, but also the infighting of the Otomo clan.
そのため、義統は形式的な君主に過ぎず、1580年頃には宗麟と義統の関係は不和だったと言われているし、大友氏が島津氏の侵攻に一方的に押されたのも、耳川の戦いにおける敗戦だけではなく、家中における権力闘争も原因だったと言われている。