Tokyo Zombie

The story revolves around Fujio and Mitsuo, two guys who work at a fire extinguisher plant. They're best friends who spend their free time engaged in male bonding - specifically, jujitsu. Mitsuo was a great jujitsu champ in the past. No matter how hard he tries, Fujio can't pin him. Their boss catches them wrestling, which leads to the pair accidentally killing him with a fire extinguisher. Fujio and Mitsuo take off in a funky van and soon come face to face (or rather, bumper to face) with a variety of the zombies created by "Black Fuji", a mountain of garbage. Mitsuo becomes smitten with a pretty young woman at a convenience store and decides to "rescue" her from a herd of zombies by throwing her over his shoulder and running for the truck. In the process, he's bitten by one of the zombies. Convinced he's doomed to become one of the undead, he leaps off a bridge into a river and out of Fujio's life. Fast-forward five years. A bunch of zombies have been captured and some surviving humans are being used as slaves. Packs of bloodthirsty old women are being entertained by a staging of gladiator-style zombie battles. Fujio finds that he must use the fighting skills that his lost buddy Mitsuo taught him to survive.