Gaki

In Japanese folklore, it is a kind of undisturbed spirits of the dead-yurei, capable of inhabiting living people.

Gaki (yap. 餓鬼) — eternally hungry demons inhabiting one of the Buddhist worlds — Gakido. They are reborn by those who, during their life on Earth, gorged themselves or threw away quite edible food.

Gaki's hunger is insatiable, but they cannot die from it. They eat anything, even their children, but they can't get enough. Sometimes they get into the World of People, and then they become cannibals. They are depicted as "skin-and-bones" people.