 His son, Tamura Tatsuaki moved his seat from Iwamura to the vacant seat of Ichinoseki in 1681.In 1681, the second "daimyō" of Iwanuma, Tamura Tatsuaki relocated his seat to Ichinoseki.Tatsuaki was the great-grandson of Date Masamune, and was especially favoured by "shōgun" Tokugawa Tsunayoshi, and despite his "tozama" status enjoyed many of the privileges accorded to a "fudai daimyō".