Katsusuke became one of Takeda Katsuyori's closest advisors and is well-known (or perhaps infamous) for supporting Katsuyori's decision to attack the Oda and Tokugawa at Nagashino in 1575. He assisted Katsuyori in his later campaigns and committed suicide after the Oda invaded Kai and Shinano in 1582. One of his sons, Masakatsu, would go on to serve Tokugawa Ieyasu and fight in the Nagakute Campaign.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005