Uma to onna to inu. Aka Horse and Woman and Dog (1990). Dir. Hisayasu Sato.

Starring Kanako Kishi and Kazuhiro Sano, Hisayasu Sato's shocking Pinku is atmospherically set on an isolated beach front property. The strikingly sadistic equestrian protagonist's unrepentantly degenerate pecadiloes frequently prove wholly bestial. Gleefully smutty, often outlandish and refreshingly frank, Horse Woman Dog revels in a lurid pick and mix of bracingly illicit exotica! Unlikely to appease those with mainstream tastes, there is sure to be something here to offend/excite fans of furthest flung fleshly fictions! While there are vestiges of genuine tenderness, this is aggressively confrontational material that should certainly spice up an evening's viewing.