As the Lord of Sasayama Domain, Yasunobu conducted a four-year land survey so as to establish the goson-sei system (the self-governing system of coalitions of villages), and eradicated powerful local clans who had previously wielded power over the region, thereby succeeding in fortifying the domain duties.
篠山藩政では、4ヵ年にわたる検地を実施して郷村制度を確立し、さらに旧勢力である土豪を一掃して藩政を確立している。