Volume 4's cover art, done by Nihei, with the title "Akai Kiba".

Akai Kiba (赤い牙) is an anthology doujinshi, published between 2002 and 2014. It featured many one-shots from Tsutomu Nihei and other famous mangakas (such as the author of Bokurano, No Longer Human, Blade of the Immortal and Dorohedoro). The anthology spanned 9 total volumes, and was sold at the Komiket.

One-Shots by Nihei