In the meantime, Ieyasu, who invaded Kai Province, skillfully persuaded Masayuki SANADA into the Tokugawa side with the help of Nobushige YODA, and also supported Sadayoshi OGASAWARA of Tokugawa side, which caused a confrontation between him and the Hojo army (Tenshojingo Rebellion).
一方、甲斐に侵攻した家康は依田信蕃を通して真田昌幸を調略し、さらに徳川方の小笠原貞慶への肩入れなどにより、北条軍と対立した（天正壬午の乱）。