Another theory states that there was a rumor that the Yoshinobu Incident was caused by close followers of Yoshinobu, and some argue that it was a remote cause that led to the fall of Takeda clan.
また、一説では義信事件は勝頼の側近によって起こされたという風評があったとまでいわれ、義信事件を武田氏滅亡の遠因に求める論者もいる。