In June or July (June in old lunar calendar) 1574, he virtually suppressed Higashi Totomi by invading the Tokugawa territory, taking control of Takatenjin-jo Castle, the strong fortress, which Shingen could not take control of, and removing Nobuoki OGASAWARA, the general of the guards of the castle, from power (the Battle of Takatenjin-jo Castle).
6月、遠江国の徳川領に侵入し、信玄が落とせなかった遠江の堅城・高天神城を陥落させて城将・小笠原信興を降し、東遠江をほぼ平定した（高天神城の戦い）。