The gashadokuro are in Japanese folklore, the ghosts of people who have starved to death. The gashadokuro (“starving skeleton”) appears as a giant skeleton—up to 15 times taller than a person—made up of the bones of the starved dead. It roams about after midnight and announces itself with a ringing noise that sounds in the ears. If you do not flee, it will bite off your head with its giant teeth.
The Encyclopedia of Ghosts and Spirits – Written by Rosemary Ellen Guiley – September 1, 2007