Kubikajiri
The kubikajiri is in Japanese folklore, a head-eating ghost that lurks about graveyards late at night searching for its own lost head. The kubikajiri eats the heads of both the living and the dead. It announces its presence with the smell of fresh blood. If you see it, you are likely to lose your own head.
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SOURCE:
The Encyclopedia of Ghosts and Spirits– Written by Rosemary Ellen Guiley – September 1, 2007