| When the Takeda clan's legal son Yoshinobu was disinherited due to Takeda Yoshinobu Incident, he became the heir, and in 1573, he took over as head of the family as the result of Shingen's death. |
武田氏の正嫡である義信が信玄後期の武田義信義信事件により廃嫡されると継嗣となり、元亀4年（1573年）には信玄の死により家督を相続する。 |