Takeda Nobukatsu
Nobukatsu was the eldest son of Takeda Katsuyori and was at first called Takeomaru. Takeda Shingen had ordered as part of his last will that Nobukatsu be named the head of the Takeda when he turned 16, with his father Katsuyori acting as guardian until then. He joined his father on campaign against the Hôjô in 1580. He committed suicide alongside Katsuyori following the Oda/Tokugawa invasion of Kai and Shinano, the same year he might have expected to be named the next lord of the Takeda.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005