In July 1869, Yasuaya was appointed as the governor of Tatsuno clan in accordance with the return of lands and people to the emperor and then worked on the reform of the ladder in the domain, but was dismissed from the office of the governor due to Haihan-chiken (abolition of feudal domains and establishment of prefectures) in August 1871.
明治2年（1869年）6月、版籍奉還により龍野藩知事に任じられ、その後は藩の職制改革などに務めたが、明治4年（1871年）7月の廃藩置県で藩知事を免職された。