Like a more audacious cousin of the ami-kiri, these spirits are known for sneaking up on people and cutting their hair off at the roots. They seem inclined to attack in the bathroom, and are fond of the hair of servant girls. In the Meiji Era a ghostly hair-cutting attack even made it into the newspapers.1

They are also said to attack people who are about to marry an animal or ghost in human form, perhaps to thwart such an improper union.²

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1. Mizuki vol. 1 2003, p. 37, http://www.nichibun.ac.jp/YoukaiCard/6520005.shtml>source 1, source 2.

2. source 3.