Yasukage served Tokugawa Ieyasu from childhood and in 1565 was named one of Mikawa's San-bugyô, or Three Commisioners (along with Honda Shigetsugu and Koriki Kiyonaga). He assisted Okubo Tadayo in a well-known night raid on the Takeda army following the Battle of Mikatagahara and was given a 10,000-koku fief in 1590.
References
- Initial text from Sengoku Biographical Dictionary (Samurai-Archives.com) FWSeal & CEWest, 2005