He was active in his duties including the restoration of Amakusa, and in July or August, 1659, still in his term of service, he succeeded in having kokudaka (a system for determining land value for tribute in the Edo period) of Amakusa reduced in half, which his adoptive father had not been able to realize.
天草復興などに活動し、任期中の万治2年（1659年）6月には養父が実現できなかった天草の石高半減に成功している。