Although Nobutaka became the head of the clan after the death of Nobuyasu, vassals supporting Nobumasa soon expelled him from Mariya-jo Castle in alliance with Yoshiaki ASHIKAGA and Yoshitaka SATOMI.
信保の死後、当主になった信隆ではあったが、程なく信応派が足利義明や里見義堯と同盟を結んで信隆を真里谷城から追放してしまう。