Arimasa Osawa
Writing
Known For

Hard-boiled suspense drama series about a detective feared as the "Shinjuku Shark" who bravely stands up to evil.
Shinjuku Shark

A blind female assassin lives alone in a remote house; her superiors occasionally send her "clients" / targets that she shoots right after having sex with them in her completely darkened bedroom.
XX: Beautiful Weapon

A young boy with a troubled home life becomes "chosen," and he stumbles into the middle of a great war of yōkai (a class of mythological creatures), where he meets a group of friendly yōkai who become his companions through his journey. Now he must fight to protect his friends and free the world of the yōkai from oppression.
The Great Yokai War

Adaptation of the Arimasa Ohsawa novel Shinjuku Shark.
The City That Never Sleeps: Shinjuku Shark

Cheryl, a sexy bodyguard, crosses paths with a hit man from her past; she is forced to use all her skills, including the art of seduction, to escape.
XX: Beautiful Killing Machine

Togashi, an enthusiastic marathon runner and his wife are occupied with their daughter Mayumi's grade school entrance examinations, but he becomes jobless when his company folds. To regain his confidence Togashi decides to join the marathon that is taking place on the very day of his daughter's examination and the all important interview.
The Exam
Police struggle to uncover Klein, a powerful criminal organization. Asuka, a young detective, is assigned to contact and escort Hatsumi, a mistress of the drug lord Kimikuni, but they are ambushed, leaving Hatsumi brain-dead and Asuka near to death. However, the police concoct a top-secret plan to infiltrate Klein by transplanting Asuka's brain into Hatsumi's body.
The Battling Angel

An action in which a former CIA female operative captures a revenge drama that unfolds against a huge secret organization.