Under Nobunaga, he took part in a great many battles, including the  Siege of Ichijodani Castle (1573), the Battle of Nagashino (1575) served as the commander-in-chief of the infantry units.
As a prominent figure under Nobunaga, he was instrumental in many crucial battles, such as the 1573 siege of Ichijodani Castle and the 1575 Battle of Nagashino, where he led the ground troops.