奥羽越列藩同盟
During the Boshin War of 1868–69, the Sōma clan fought on the site of the Ōuetsu Reppan Dōmei, supporting the Tokugawa regime. After Meiji Restoration, the head of the Sōma clan became part of the "kazoku" peerage, with Sōma Aritane receiving the title of "shishaku" (Viscount).