Anayama was the son of Anayama Izu no kami Nobutomo (d. 1560). He became Takeda Shingen's brother-in-law and saw service in many Takeda campaigns, later being given Ejiri castle. He was present at the Fourth Battle of Kawanakajima (1561), Minowa (1566), Odawara (1569), Mikatagahara (1573), and Nagashino (1575). In 1582 he betrayed Takeda Katsuyori and joined Tokugawa Ieyasu, though he was assassinated shortly after the death of Oda Nobunaga, possibly by former Takeda retainers. He is said to have acted as a gunnery expert of sorts for Shingen during his career and was also known as Anayama Beisetsu.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005