佐竹氏
was a "daimyō" in Sengoku period and early Edo period Japan under the Tokugawa shogunate and the 19th head of the Satake clan and 1st "daimyō" of Kubota Domain in Dewa Province. His courtesy title was "Sakonoeshōshō", later "Ukyō-dayū" and "Jijū" and his Court rank was Junior Fourth Rank, Upper Grade.