Ninja Slayer Kills, Volume 1

ALL NINJA MUST PERISH
In the gritty, futuristic city of Neo-Saitama, the streets run slick with acid rain and blood. Here, an army of cybernetics-clad ninjas runs amok under the menacing rule of the Soukai Syndicate. As incessant strife wrought by a ninja turf war takes the lives of all citizens who end up in the crossfire, one can only hope to end the day without getting a suriken to the skull. But in these dark, tragic times, a spirit of vengeance rises to kill all wicked Ninja who terrorize Neo-Saitama. This crimson avenger is Ninja Slayer, and he will not rest until all Ninja have been slaughtered at his hands.

Though their existence is shrouded in rumor and mystery, the American authors Bradley Bond and Philip Ninj@ Morzez first published Ninja Slayer in a college literary magazine. Some time later, Japanese translators Yu Honda and Leika Sugi came across the original material and helped the authors publish the title on Twitter, making it an underground success in Japan that resulted in the publication of novels, manga, and an upcoming animated series.