However, the clan remained split because the family line including Koretoki, Korezumi, and Koremura ASO allied with the Northern Court, and the family line including Koretake ASO (younger brother of Koremura) allied with the Southern Court and fought against each other.
だが、その後も惟時-惟澄-阿蘇惟村のラインが北朝方、阿蘇惟武（惟村の弟）のラインが南朝(日本)方について争うなど分裂は続いた。