Gantz
Gantz is this sci-fi anime which sees the protagonist beheaded in the first episode in a bizarre incident. Instead of dying and going to your typical fire and brimstone hell, our guy lands in a tatami matted room, filled with all manner of people from a salaryman to gangsters. The pic above is from one of the earlier chapters which depicts this naked girl being teleported into the room after a suicide attempt. She slowly slices in, bit by bit, in an unabashedly crude and raw fashion that announces this anime's disregard for decorum. I'm reminded of Gunther von Hagens and perhaps he had some influence on this anime.
The violence, sex and moral dilemmas that follow make this an intriuging, adult manga exploring the issues of humanity, violence and survival. There's a chilling similarity with von Hagens' brutal frankness in his work, which really fortifies the attitude of this fist in your face of an anime.
