Oni

Oni(Japanese demons) are depicted with horns on their head, pointed tusks at the corners of their wide mouth, a muscular body wearing a tiger-skin loincloth.
The northeast direction is considered to be a “demon’s gate” (KIMON) and therefore an unlucky direction, and that is why oni have the horns of an ox and the skin of a tiger.
The word ”oni” is said to have derived from the character “oni” meaning “hidden” to signify things that are invisible, the dead, spirits and ghosts. Stories abound of ni brutally devouring human beings, but oni may merely represent social unrest or the spirit world.