Namahage

In Japanese mythology, scary creatures living in the mountains along the northern coast of the Sea of Japan, with bright red or blue skin, disheveled hair and wild eyes. They have wide mouths full of sharp teeth, and often horns on their foreheads. They are dressed in straw wraps and raincoats, and they hold large knives in their hands. At the same time, they attack only those who have been lazy or angry for a year.