Brutal and nihilistic sexploitation/pinku eiga film with surreal and arthouse touches, the latter probably both one of its main weaknesses and the element that differentiates it from the huge mass of other films of the same sub-genre. The debts with Argento and with classic pink violence movies are very clear here, but Eat the Schoolgirl also features elements that would be picked up by future extreme/underground films.
What hinders the film the most, anyway, is the narrative, which is too convoluted and takes itself way too seriously (mainly in terms of symbolical value): I guess you just gotta make up your mind wether you wanna make a film about sexual disfunction by showing raping and torture or by dealing with childhood trauma and mommy issues. The two perspective together feel unbalanced and confused.
Not one of my favourite extreme films, but not the one I hated the most either. Tomomatsu can thank Lucifer Valentine for that.