Kamaitachi (窮奇, sometimes also 鎌鼬)'s a Japanese yōkai, most common in the Kōshinetsu region. There're several conceptions of how it looked or operated, but the most common's one of a trio of weasels with sharp claws, riding on a gust of wind and cutting peoples' skin on the legs. According to this interpretation, the first weasel knocked the unsuspecting victim down, the second cut the victim's flesh and the third applied medication to the wounds, so that a… (More on Kamaitachi)