Since his uncle Tadataka, who was the head of Matsue domain, 260,000 koku (approximately 46.8 million liters of crop yield), died without any legitimate child in 1637, he was adopted on his deathbed and his territory was diminished to 60,000 koku (approximately 10.8 million liters of crop yield), Tatsuno domain of the Harima Province.
1637年（寛永14年）に松江藩26万石の藩主であった伯父の忠高が嫡子を残さずに亡くなった為、その末期養子となり、播磨龍野6万石へと減封される。