Sukemune who had been favorably promoted and favored by Iemitsu TOKUGAWA was assigned for a managerial position in Edo bakufu initially called 'Rokuninshu' later called 'Wakadoshiyori,' and became a lord of the Yamakawa Domain, Shimotsuke Province which yielded 15,600 koku in rice.
資宗は順調に出世し、徳川家光からの覚えも良く、六人衆（のちの若年寄）となり、さらには下野国山川藩15600石の藩主となる。