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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. He becomes the 'Ninja Slayer', a warrior obsessed with killing every last ninja to avenge his family. Ninja Slayer was originally released in segments on Twitter; this is the first full collection of this innovative new series.