The first lord, Tanemasa KUTSUKI's father, Uetsuna KUTSUKI (the lord of the Tsuchiura Domain) who served as Okosho Bangashira (the chief of the bodyguard of the Shogun) and Sojaban (an official in charge of the ceremonies) under Iemitsu TOKUGAWA was treated well as a fudai daimyo (a hereditary daimyo) with an award of 30,000 koku in Hitachi Tsuchiura.
初代藩主・朽木稙昌の父・朽木稙綱(土浦藩主)は徳川家光のもとで御小姓番頭、奏者番を務め、常陸土浦に3万石を与えられ、譜代大名として厚遇された。