Tokugawa Ietsuna
was a "daimyō" (feudal lord) in Shimōsa Province, and top government advisor and official in the Tokugawa shogunate of Japan. He served as "rōjū" (chief advisor) to "shōgun" Tokugawa Ietsuna from 1679–80, and as "Tairō" (head of the "rōjū" council) under Tokugawa Tsunayoshi from the 12th day of the 11th lunar month of 1681 until his death on 7 October 1684.