Sakai Tadakiyo (?? ??, November 29, 1624 – July 4, 1681), also known as Uta-no-kami, was a daimyo (feudal lord) in Kozuke Province, and a high-ranking government advisor and official in the Tokugawa shogunate of Japan.The Sakai were identified as one of the fudai or insider daimyo clans which were hereditary vassals or allies of the Tokugawa clan, in contrast with the tozama or outsider clans.