Terrifying Girls' High School: Lynch Law Classroom (1973, Norifumi Suzuki)

Solid installment in the "pinky violence" genre - or even specifically, the "Terrifying Girls' High School" series. The plot follows your typical 'female bent on revenge' formula and accompanies it with liberal amounts of sex and violence.

After a student at a reformatory for delinquent girls is tortured and killed, a newcomer who happens to be the murdered girls former friend, forms an alliance of other 'bad eggs' to take down the corrupt school staff. There's a gang of girls called The Disciplinary Committee that is supported by the school administration to physically torture and/or humiliate any student who gets out of line. Turns out The School of Hope - as it is ironically christened - is also in cahoots with seedy politicians who are blackmailed with the help of a crafty sleuth...

There's some off-the-wall shit going on all over this one. Vaginal light bulb insertion, blood draining, pubic electrocution, and piss humiliation. I wouldn't go so far as to call "Terrifying Girls' High School: Lynch Law Classroom" the BEST of the Japanese sexploit category (check out Norifumi Suzuki's "Sex & Fury" or "Star of David: Hunting for Beautiful Girls"), but it definitely has it's "moments" and is consistently entertaining...