From the early times, he served for Ieyasu TOKUGAWA, and when Nobunaga ODA started to attack the Takeda clan in 1582, he joined the Ieyasu troop, and rendered a distinguished war service.
早くから徳川家康に仕え、天正10年（1582年）の織田信長の武田氏攻めが始まると、家康軍に従軍して功を挙げた。