Kamaitachi

かまいたち

Kamaitachi (lit. Sickle Weasel) is a recurring antagonist in the GeGeGe no Kitarou franchise. He first appears in the Shonen Magazine story "Youkai Castle." Despite his name, the Kamaitachi from Youkai Castle does not resemble the weasel youkai of legend. (Source: GeGeGe no Kitarou Wiki)