Yasukatsu was the son of Kasahara Nobutame and a noted retainer of Hôjô Ujiyasu. He happened to be in Kanbara castle in Suruga province when that place was attacked by Takeda Katsuyori and Takeda Nobutoyo in 1569. The castle fell to the Takeda and Yasukatsu was killed.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005