Naotomo continued to support the Northern Court (Japan) power of Takauji ASHIKAGA after his father's death, and went against the Shirakawa Yuki clan, Oda clan, and Seki clan of the Southern Court.
直朝は父の代に引き続き足利尊氏の北朝(日本)勢力に与し、南朝方の白河結城氏、小田氏、関氏などと対立した。