奥羽越列藩同盟
During the Boshin War, the Ikoma clan initially signed the Ōuetsu Reppan Dōmei agreement, but quickly switched sides on the approach of the forces of pro-Imperial Shinjō Domain. The new Meiji government rewarded the Ikoma for their quick defection from the Ōuetsu Reppan Dōmei in 1868 with an increase in revenues to 15,200 "koku", restoring the clan to the ranks of the daimyo after 250 years. The new Yashima Domain was rewarded a further 1,000 "koku" in 1869, with control of 47 villages in what became Yuri District, Akita.