From wiki

Tamakeri (玉蹴り)(lit. ball kicking) is a sexual fetish and sub-genre in which a female kicks, knees, punches, grabs, twists, bites, cuts or a man's testicles. This act is shown in some Japanese horror films, such as Busted Balls.[1]

Any one know this film? Seems a bit of a rather generic name for it so guessing its gonna be hard to find anything of it.......