Tokugawa Nariaki
During the Bakumatsu period, in 1857 the 14th "daimyō" of Morioka, Nanbu Toshihisa, married the third daughter of Tokugawa Nariaki of Mito Domain. With the start of the Boshin War, the domain initially attempted to remain neutral, but bowed to pressure from Sendai Domain and joined the Ōuetsu Reppan Dōmei. Morioka forces attacked the pro-Imperial Tsugaru Domain and Akita Domain. As a result, the new Meiji government treated Nanbu clan harshly at the end of the war by seizing the territory and expelling the Nanbu clan to the vacant Shiroishi Castle, where a new 130,000 "koku" domain was created out of former Sendai Domain lands in early 1868.