Demon Gate is a concept from China and Onmyōdō. The northeast direction was once termed the kimon (鬼門, 'demon gate'), and was considered an unlucky direction through which evil spirits passed. Based on the assignment of the twelve zodiac animals to the cardinal directions, the kimon was also known as the ushitora (丑寅), or 'Ox Tiger' direction, and the oni's bovine horns and cat-like fangs, claws, and tiger-skin loincloth developed as a visual depiction of this term.