Masamitsu was the son of Hoshino Masanao and after the Sekigahara Campaign received Takato in Shinano province (1600). He served at the seiges of Osaka Castle (1614, 1615) and later adopted the 4th son of the shôgun Tokugawa Hidetada.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005