Sōma clan
was the 5th "daimyō" of Sōma-Nakamura Domain and the 21st hereditary chieftain of the Sōma clan. As his older brother Sadatane had died without heir, he was posthumously appointed successor. He was received in formal audience to Shogun Tokugawa Ietsuna and received the courtesy title of "Danjō-shōhitsu". From 1689-1690 he served as a "sobayōnin" to Shogun Tokugawa Tsunayoshi. He retired from public life in February 1701, living in rural seclusion to his death at the age of 68 in 1728.