On the other hand, Ujinao HOJO of Sagami Province, who had known that both Kai Province and Shinano Province became blank areas, invaded Shinano Province across Usui-toge Pass, leading an army of 55,000, including Ujinori HOJO, his uncle, and Ujiteru HOJO.
一方、甲斐国と信濃国が空白地帯となったのを見た相模国の北条氏直も、叔父・北条氏規や北条氏照ら5万5,000人の軍勢を率いて碓氷峠を越えて信濃国に侵攻した。