After Mototsuna was dead, because his property inheritance was divided into his three sons, Nobutsuna KUTSUKI, Tomotsuna KUTSUKI and Tanetsuna KUTSUKI (the lord of Tsuchiura clan), the head family of the Kutsuki family was disqualified from the position of daimyo and demoted to hatamoto (direct retainers of the bakufu, which is a form of Japanese feudal government headed by a shogun).
元綱の死後、その遺領は朽木宣綱・朽木友綱、朽木稙綱(土浦藩主)の3子に分割したために、朽木宗家は大名の資格を失って旗本（6300余石）となった。