Brook

Miage-Nyuudou

見上げ入道
Miage-Nyuudou (Look up monk) is a Mountain Youkai and a frequent antagonist of Kitarou's. He first appeared in the Shounen Magazine story of the same name. In most incarnations, he runs a school for training mortals into youkai called Youkai School. (Source: GeGeGe no Kitarou Wiki)