お家騒動
The first Ichinoseki Domain was created in 1660 for Date Munekatsu, the 10th son of Date Masamune, although a fortification had existed at Ichinoseki since the Muromachi period. It was a subsidiary domain to Sendai Domain. However, Data Munekatsu was a central figure in the Date Sōdō, an "O-Ie Sōdō" over the succession to the Date clan and was dispossessed in 1671, with his holdings reverting to Sendai Domain.