A kamaitachi ("Sickle-weasel") is a type of yokai from Japan. Frequently depicted as weasel-like creatures that can magically fly within a whirlwind and possessing sharp, sickle-like claws that can injure a person without drawing blood, they also have been portrayed as other things, such as possessed sickles and shovels or transformed hair cut off from a vengeful woman's head, but all versions have the same hostile-to-humans, flying behavior.

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Kamaitachi (Wikipedia)