In the Battle of Togeshita in the early stage of Hakodate War, he tracked the enemy who killed Yutaka MIYOSHI (Hannosuke OGASAWARA, younger brother of Nagamichi), but was hit in the chest by the enemy and killed on the way.
箱館戦争初期の峠下の戦いで三好胖（小笠原胖之助。長行の弟）が討たれたため、敵を追跡したが、途中、胸に敵弾を受けて戦死した。