In 1565, according to "Gunkan," the vassals of Yoshinobu TAKEDA, his older paternal half-brother and the heir of the Takeda family, were executed for the conspiracy to assassinate Shingen, and Yoshinobu himself was confined (Yoshinobu incident, Yoshinobu died in 1567 in confinement).
永禄8年（1565年）、『軍鑑』に拠れば異母兄で武田家後継者であった武田義信の家臣らが信玄暗殺の密謀のため処刑され、義信自身も幽閉されている（義信事件、義信は幽閉された末、永禄10年（1567年）に死去）。