Ibaraki-dōji
Ibaraki-dōji is an oni (demon or ogre) featured in tales of the Heian period. In the tales, Ibaraki-dōji is based on Mount Ōe, and once went on a rampage in Kyoto.
Source: Wikipedia, Ibaraki-dōji. Text licensed CC BY-SA 4.0. Not endorsed by or affiliated with Wikipedia or the Wikimedia Foundation.