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.

The Kumaso (熊襲) were a mythical people of ancient Japan mentioned in the Kojiki, believed to have lived in the south of Kyūshū until at least the Nara period. The last leader of the Kumaso, Torishi-Kaya was killed by Yamato Takeru in 397. The name of Kumamoto Prefecture originates from the Kumaso people.