Koroshiya 1 - Yamamoto, Hideo

In Shinjuku Kabukichou, the biggest sin town in Japan, there are two crazy guys. Ichi is a coward and a wimp, but once he breaks into tears, he turns into a human weapon. With great martial arts skill and a blade hidden in his boots, he butchers a bunch of enemies into mincemeat in the blink of an eye. His arch enemy is Kakihara, a yakuza boss who's tired of everything, including himself. Only when he pierces, cuts, and burns his own and other people's bodies does he feel that he is alive.

In 2001, Koroshiya 1 was adapted into a live-action film which was directed by Takashi Miike.

The series has been published in Spanish as Ichi the Killer by ECC Comics since February 20, 2015.