三方原之戰
In 1565 he was named one of Mikawa's San-bugyô, or Three Commissioners (along with Honda Shigetsugu and Koriki Kiyonaga). Yasukage was known for his patience, Shigetsugu for his fortitude, and Kiyonaga for his leniency; In 1575 he assisted Okubo Tadayo in a well-known night raid on the Takeda army following the Battle of Mikatagahara.