Rust

Story:

The supervisor of Ha Maru, a butcher employed by a livestock company, extends an invitation to him to travel to Japan for business. But he quickly finds out that the location to which he has been transported is a Yakuza-run criminal organization. Ha Maru fights to survive in this hostile environment and gradually discovers that he has a gift with knives. Now that he's entered the underworld, the butcher must battle the elite of the criminal underworld in order to survive.