Shigurui: Death Frenzy is a manga series written and illustrated by Takayuki Yamaguchi. The first 32 chapters have been adapted into an anime.
Produced by Madhouse Studios (Beyblade, Ninja Scroll, Trigun), the series was directed by Hiroshi Hamasaki and written by Seishi Minakami.
The series is famously noted for its realistic graphic violence and nudity, (sorry folks, it’s adults only!).
The anime releases on blu-ray and dvd boxsets this May and to celebrate, here’s an awesome trailer: