Ninja Slayer Kills (Manga) Vol 02

In the cyberpunk metropolis of Neo Saitama, Kenji Fujikido is an average salaryman whose wife and children are suddenly assassinated. Tracking the murder back to a ninja, Fujikido trains to seek vengeance - initially on those who murdered his family, but ultimately on every ninja on the planet. Kodansha Comics
(W/A/Ca) Kotaro Sekine