Tokyo Zombie

Two factory workers and jiu-jitsu practitioners aspire to train abroad and gain recognition. After accidentally killing their domineering boss, they bury him on a garbage dump contaminated with industrial waste, which causes the dead to reanimate as flesh-eating zombies. As they struggle to survive, the two are separated due to a foolish incident involving potato chips and a dog. Several years later, Tokyo has transformed into a post-apocalyptic feudal society where the wealthy enslave the poor and stage gladiatorial fights between zombies and slaves. The two reunite in this new world.