Asset contain 2 texture variations - clean and dirty. You can switch between them with "switch" arrow (just move it by X-axis), or switch it manualy at shader editor (in materials M_Kozo and M_Cloth). Hitotsume-kozō (一つ目小僧) are a Yōkai (supernatural apparition) of Japan that take on the appearance of a bald-headed child with one eye in the center of its forehead similar to a cyclops