Nagayasu was appointed the magistrate of Sado Province in July, the magistrate of estates (later, the commissioner of finance) in December, and was simultaneously ranked among senior administrators (later, a member of shogun's council of elders).
7月には佐渡奉行に、12月には所務奉行（のちの勘定奉行）に任じられ、同時に年寄（のちの老中）に列せられた。