Sanuki Province was a province of Japan in the area of northeastern Shikoku. Sanuki bordered on Awa to the south, and Iyo to the west. Its abbreviated form name was Sanshū (讃州). In terms of the Gokishichidō system, Sanuki was one of the provinces of the Nankaidō circuit. Under the Engishiki classification system, Sanuki was ranked as one of the "upper countries" (上国) in terms of importance, and one of the "middle countries" (中国) in terms of distance from the capital. The provincial capital was located in what is now the city of Sakaide, but its exact location was only identified in 2012. The ichinomiya of the province is the Tamura jinja located on the city of Takamatsu.

Shikoku , Japanese pronunciation: [ɕikokɯ] is the smallest of the four main islands of Japan. It is 300 km or 186.4 mi long and between 50 and 150 km or 31.1 and 93.2 mi at its widest. It has a population of 3.8 million, the least populated out of Japan's four main islands. It is south of Honshu and northeast of Kyushu. Shikoku's ancient names include Iyo-no-futana-shima (伊予之二名島), Iyo-shima (伊予島), and Futana-shima (二名島), and its current name refers to the four former provinces that make up the island: Awa, Tosa, Sanuki, and Iyo.