Koroshiya 1: The Animation Episode 0

Do not be confused because ICHI THE KILLER: THE ANIMATION EPISODE 0 is not the prequel to Takashi Miike's 'live-action' version of Hideo Yamamoto's infamous manga, it is the prequel to Hideo Yamamoto's infamous manga.

It's about Ichi when he was a student in high school and how he was bullied, what he was like when he was with his family and friends and how he became a twisted and sadistic assassin.

This prequel is really cool: good animation, a well-written script and a hardcore soundtrack make this film worth a watch. Although some people may find this film too short or too much like a big music video. Other than that, it's worth watching, but read the comic book before watching it.