Manga Written and illustrated
Hideo Yamamoto,
Ichi the Killer was preceded by a short series, titled , which was published in
Shogakukan's
manga magazine
Weekly Young Sunday in 1993, and its chapters were collected in a single volume, released on August 5, 1993.
Ichi the Killer was serialized in the same magazine from 1998 to 2001. Shogakukan collected its chapters in 10 volumes, released from June 5, 1998, to July 5, 2001. Shogakukan republished the series in five volumes, released from April 14 to August 11, 2007. A five-volume edition was released by Shogakukan between February 27 and June 30, 2015. In August 2024,
Seven Seas Entertainment announced that it had licensed the series, releasing it in a five-volume
omnibus edition starting on July 29, 2025, which will be followed by the release of a "Volume 0".
Live action films A
live action film adaptation, directed by
Takashi Miike, premiered in Japan on December 22, 2001. A
direct-to-video live action prequel film, titled
1-Ichi, directed by Masato Tanno, was released on January 24, 2003.
Original video animation A prequel
original video animation (OVA) by
AIC, titled , was released on VHS and DVD on September 27, 2002. In North America, the OVA was licensed by
Central Park Media and released on DVD on September 21, 2004. It was licensed in Australia and New Zealand by Siren Visual and released on February 21, 2005. ==Reception==