Ninja Slayer Series

In an ancient era of supposed tranquility, merciless demigod-like ninjas ruled Japan through their mastery of karate. However, a forbidden faction defied the natural order by performing a ritualistic form of hara-kiri, sealing their souls within Kinkaku Temple to await future resurrection. Their true history was deliberately falsified and hidden away until the world forgot they ever existed. Now, in a distant cybernetic future where electronic networks are worshipped as gods, those sinister ancient souls have been unleashed upon the dark shadows of Neo-Saitama. Kenji Fujikido is an ordinary salaryman whose life is shattered when his wife and child are killed during a violent ninja turf war. Brought to the brink of death himself, he is suddenly possessed by an enigmatic ninja soul that grants him a second chance at life. Transformed into the Ninja Slayer, he becomes a grim reaper driven by an unyielding personal vendetta. Operating within the dystopian underworld of Neo-Saitama, he wages a relentless one-man war against evil, engaging the ruthless ninjas of the Soukai Syndicate in deadly combat.