Together with his father Hideuji, during the Battle of Sekigaharara in 1600, he allied with the Western forces and participated in attacks on Yusai HOSOKAWA's stronghold at Tanabe Castle in Tango Province (Battle of Tanabe Castle).
慶長5年（1600年）の関ヶ原の戦いでは、父秀氏とともに西軍に与して細川幽斎が拠る丹後国田辺城(丹後国)攻撃（田辺城の戦い）に参加した。