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.

The Kojiki , also sometimes read as Furukotofumi or Furukotobumi, is an early Japanese chronicle of myths, legends, hymns, genealogies, oral traditions, and semi-historical accounts down to 641 concerning the origin of the Japanese archipelago, the kami (神), and the Japanese imperial line. It is claimed in its preface to have been composed by Ō no Yasumaro at the request of Empress Genmei in the early 8th century (711–712), and thus is usually considered to be the oldest extant literary work in Japan.