If it's gory Japanese torture you're after, you'd be better off watching The Joy of Torture 2-Oxen Split Torturing: that one is nasty! However, if it's sexual abuse you're looking for, with the emphasis on extreme deviancy and perversion, Girl and the Wooden Horse Torture is the way to go, the film being a catalogue of filth and depravity that is so excessive at times that it proves laughable (so long as you have a warped sense of humour, that is).
Serina Nishikawa plays sexy schoolgirl Tsuchiya, who has naughty nightmares about classmates being abused by her teacher Muraki (Shirô Shimomoto), and in which she is sexually molested by her own parents. In her spare time, Tsuchiya practises bondage on herself. When Muraki is wrongly accused of raping two schoolgirls, Tsuchiya keeps quiet despite having seen what really happened (in reality, the girls raped the teacher!). His life in ruins as a result, Muraki takes revenge on Tsuchiya in an S&M hotel, using a range of specialist equipment to do so (including, of course, the titular wooden horse).
With wall-to-wall depravity and loads of nudity (optical fogging hiding anything too explicit), Girl and the Wooden Horse Torture is classic Nikkatsu Roman Porno that holds nothing back: it starts with an up-the-skirt schoolgirl pantie flash and gets more and more daring as it progresses, ending with a forced enema followed by Tsuchiya peeing in Muraki's mouth so that he can swallow his heart medicine. I'm not totally sure I understood all that was happening, even with the benefit of subtitles, but with so much exploitative action, featuring lots of battery-powered 'toys', there is never a dull moment.
