In 1868, from Tadauji's retirement due to suspension with actions supportive of the shogunate, he changed his name to Tadatoshi and regained his position as the lord of the domain.
明治元年（1868年）、佐幕的行動をとって謹慎処分を受けた忠氏の隠居を受け、忠禄と名を改めて藩主の座に返り咲いている。