In the Battle of Sekigahara in 1600, he took part in the army along with his third son Nobuhira, because his territory was completely surrounded by the eastern army.
慶長5年（1600年）の関ヶ原の戦いでは領国の周囲がすべて東軍という状況から三男の信枚と共に、東軍として参加した。