This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Koro-pok-guru (Ainu)
Korpokkur, are a race of small people in folklore of the Ainu people of the northern Japanese islands. The name is traditionally analysed as a tripartite compound of kor ("butterbur plant"), pok ("under, below"), and kur ("person") and interpreted to mean "people below the leaves of the Fuki" in the Ainu language.
The Ainu believe that the korpokkur were the people who lived in the Ainu's land before the Ainu themselves lived there. They were short of stature, agile, and skilled at fishing. Long ago, the korpokkur were on good terms with the Ainu, and would send them deer, fish, and other game and exchange goods with them. The little people hated to be seen, however, so they would stealthily make their deliveries under the cover of night.