Tsuchikorobi is one of the dirtiest yokai of all—because it's made of dirt! Tsuchikorobi is a yokai made of dirt that tumbles around and rolls over travelers. Its name literally means "rolling soil."
Yokai Masterpiece #7 - Tsuchikorobi - LEGOs.
It usually looks more like a ball of hair, which is pretty gross. Plus it doesn't have a face, but mine does.