Koro was the Matoran word for "village." There were six Koro on Mata Nui: Ga-Koro, Ko-Koro, Le-Koro, Onu-Koro, Po-Koro, and Ta-Koro.
The Matoran of Mata Nui lived in six villages, called koro. The villages were spread out in different regions of Mata Nui, and they were all distinct and had very different kinds of buildings as well as customs. Although the Matoran were very loyal to their native villages, all Matoran shared a common dream: to defeat Makuta and live in a land of peace and beauty.