In Japanese folklore, Gashadokuro, also known as Odokuro, are giant skeletons, fifteen times taller than an average person. They can reach huge sizes (up to about 90 feet tall), and are constructed from the bones of people who have died from starvation. Their bones are collected into this giant skeleton creature which is filled with intense anger and a thirst for human blood. He wanders around at night, grinding his teeth and making a “gachi gachi” sound. The giant skeleton towers so high above the ground and walks so quietly that he can be almost invisible. The only warning you get when the giant skeleton is near is a strange and inexplicable ringing in your ears.
If the Gashadokuro finds you, he will reach down with his bony hand and snatch you off the ground. Then he will pluck your head off and suck the blood out of your headless body until his thirst is quenched.
(Source: spiraphobia, via spaghetti-for-brains)