Backed up by the alliance of three countries, Kai, Sagami and Suruga, he began to attack Suwa and the Ogasawara clan and Murakami clan were ousted and Shinano became territory of the Takeda clan.
甲相駿三国同盟を背景に諏訪攻略をはじめ、小笠原氏、村上氏らは駆逐され信濃は武田領国化された。