Yasutoshi served at the Battle of Sekigahara in 1600, for his service there, he was awarded with lordship of the Nishio Domain of Mikawa (20,000 koku). During the Siege of Osaka in 1614, he defended Zeze Castle, and during the battles in the following year, took part in the actual fighting, reportedly taking over 105 heads. As a reward for his service at Osaka, he was moved to the Zeze Domain, and his stipend was increased to 30,000 koku.