Hyūga Province was a province of Japan in the area of southeastern Kyūshū, corresponding to modern Miyazaki Prefecture Hyūga bordered on Ōsumi to the south, Higo to the west, and Bungo to the north. Its abbreviated form name was Kōshū (向州), although it was also called Nissshū (日州). In terms of the Gokishichidō system, Hyūga was one of the provinces of the Saikaidō circuit. Under the Engishiki classification system, Hyūga was ranked as one of the "middle countries" (中国) in terms of importance, and one of the "far countries" (遠国) in terms of distance from the capital.

Kyūshū is the third-largest island of Japan's four main islands and the most southerly of the four largest islands. In the past, it has been known as Kyūkoku , Chinzei and Tsukushi-no-shima . The historical regional name Saikaidō referred to Kyushu and its surrounding islands. Kyushu has a land area of 36,782 square kilometres (14,202 sq mi) and a population of 14,311,224 in 2018.