Ichimatsu is one of the samurai guns and the main protagonist of the series. During the day, he works at a local tavern. During the night, however, he delivers merciless justice under the name of "Samurai Gun". He is a one-eyed warrior with a distaste for killing but a desperate look in his eyes that betrays his desire for revenge on those who slaughtered his family in front of his eyes years ago.

Has been adapted to English for dvd release. Voiced by Illich Guardiola in the English adaptation and Showtaro Morikubo in the Japanese version.