Sakai Tadaaki (?? ??, August 4, 1813 – December 5, 1873), also known as Sakai Tadayoshi, was a Japanese daimyo of the Edo period, and he was a prominent shogunal official.
He was also known as by his courtesy titles of Shuri-daibu (1834; and again in 1850); as Wakasa-no-kami (1841); and Ukyo-daibu (1862).
He was Obama's last daimyo, holding this position until the feudal domains were abolished in 1871.