Shinjuku Shark

Tokyo detective Samejima is so methodical and unrelenting in hunting criminals and thugs that he is known as the Shinjuku Shark. Feared by the yakuza (Japanese mob), he's reckless and a loner. But when a serial killer targets the city's officers with a mysterious weapon, Samejima begins investigating illegal arms dealers and gun traffickers who might know about the weapon and who has been using it.