Tengu 天狗 are mountain and forest Yōkai of Japan with two variants: a red man with a long nose or a bird-like demon. He is very similar to a goblin and their supernatural powers include shape-shifting into human or animal forms, the ability to speak to humans without moving their mouth, the magic of moving instantly from place to place without using their wings, and the sorcery to appear uninvited in the dreams of the living.

The patron of martial arts, the bird-like Tengu is a skilled warrior and mischief maker, especially prone to playing tricks on arrogant and vainglorious Buddhist priests, and to punishing those who willfully misuse knowledge and authority to gain fame or position. In bygone days, they also inflicted their punishments on vain and arrogant samurai warriors. They dislike braggarts, and those who corrupt the Dharma (Buddhist Law).