Korpokkur

The name signifies 'the people having depressions', and is usually rendered by western writers as 'Pit-dwellers'. In the Japanese writings the Koro-pok-guru are referred to as 'the small people' and 'earth spiders'. (1) These koro-pok-guru were of such small stature as to be considered dwarfs. They wore skins of animals for clothing, and that they understood the potter's art and used flint arrow-heads is clearly proved by excavations at the sites of their pits. The Ainu, on the contrary, never had any knowledge of pottery. (2)

See also Ainu, Tcho-Tcho, Yamato, proto-Japanese, Kudara, Peoples of Ancient Japan