/lit/ - Literature

I'm currently in Japan, loading up on the strangest artbooks I can find. The ukiyo-e specialists Kuniyoshi and Yoshitoshi have served me well so far.
I've been disappointed by the 19th century shunga (erotic art) collections, except for the ones that incorporate the supernatural - e.g. a woman being raped by kappas underwater, two homosexuals being ambushed by anthropomorphic vaginas, etc.

I've also bought a nice volume by a moderner, Takato Yamamoto, and I'm still looking for Suehiro Maruo and perhaps something based on Serial Experiments Lain. Nobody does creepy quite like the Japanese: as far as I'm concerned, I'm filling my suitcase with revelations.

Do you have any recommendations for grotesque or uncanny Japanese art or illustration, /lit/?