The land of Kumaso is mentioned in the mythological genesis of the island of Kyushu, and also plays a part in a tale of Yamato Takeru - both recorded in the Kojiki. The history of Komaso started and ended before the Ritsuryō province system was established at the beginning of the 8th century with the Taihō Code.
- Basil Hall Chamberlain (1883). A Translation of the “Ko-Ji-Ki”.
- Brinkley, Frank. (1915). A History of the Japanese People from the Earliest Times to the End of the Meiji Era, p. 40.
- Burke, Stephania, "Hero's Journey for the Yamato Takeru Myth in Kojiki (712)", History Through Literature Project, Office of Resources for International and Area Studies (ORIAS) at the University of California, Berkeley; retrieved 2012-6-24.