Ujimasa HOJO (Katsuyori's brother-in-law), who had been fighting with the Takeda clan since the Otate Rebellion, also decided to send troops into Kai and Shinano Provinces from Sagami, Izu and Kozuke Provinces.
また、御館の乱を契機に武田とは交戦状態となっていた北条氏政（妹は勝頼夫人）も相模・伊豆・上野国から甲斐･信濃へ進軍することに決定した。