Dirty Matsumoto is a Japanese manga artist who has been active since the 1970s, primarily working within the erotic manga and dōjinshi genres. He emerged from the underground ero-manga scene and became known for works that explore themes of bondage, fetishism, and sexual satire, often presented with a blend of dark humor and commentary on erotic culture. His pen name is a deliberate contrast to that of Leiji Matsumoto, the celebrated creator of Space Battleship Yamato; where Leiji Matsumoto represents heroic ideals, Dirty Matsumoto’s work represents the opposite, focusing on sexual realism and the "dirty underbelly" of manga culture.

Born in Kumamoto City in 1949, his early career included a six-month stint working as an assistant at Saitō Production in 1970. After leaving, he spent time doing physical labor and submitting work to gekiga (dramatic manga) magazines before starting to draw short adult manga for true-story publications. He began his professional career in earnest around 1975 with the magazine Manga Dynamite, and his first collected volume, Nikudoru no Dorei Ningyō (Meat Slave Doll), was published by Kubo Shoten in 1977.

Throughout his career, Matsumoto has created a vast body of work, often serialized in various adult manga magazines. His early success included the series Yami no Ingya-shi (Dark Slut Master), published in Manga Hunter, and other notable works such as Fushichō (Immortal Butterfly), Bishōjo Hantā (Beautiful Girl Hunter), Hōkago no Baishōjo (After-School Whore), and Hōkago no Atsui Matsuri (After-School Hot Festival). His work has been the subject of legal scrutiny; in 1978, the magazine Manga Erogenica, in which his series Datenshi-tachi no Kyōen (Fallen Angels' Mad Feast) was serialized, was seized by authorities for violating Article 175 of the Penal Code regarding the distribution of obscene materials. In the 1990s, he also began writing under the name Matsumoto M蝴蝶 (Matsumoto Miko) for the ladies' comic market.

Matsumoto’s work has also been adapted for the screen. In 1980, a collection of his short stories served as the basis for the film Sex Hunter, directed by Toshiharu Ikeda. His artistic identity is characterized by a distinctive style that evolved from an early gekiga-influence to a unique approach that incorporates elements reminiscent of shōjo manga. Recurring themes in his work include fetishistic depictions of ballet, leotards, tights, and physical conditioning, often used in scenarios involving bondage and violence. His depictions of female figures are known for a particular stylization, and his work frequently features elaborate and surreal scenarios.

Dirty Matsumoto holds a significant place in the history of erotic manga in Japan. His work has been cited as influential by notable figures; contemporary artist Makoto Aida named him as his favorite erotic artist in the December 2010 issue of Art Collector magazine, calling him "one of the masters of erotic manga". His real identity has remained unknown, a common practice for artists in dōjinshi and underground genres, which has contributed to his status as a cult figure. He continues to be active, having participated in dōjinshi events like Comiket since 1994 and in recent years has made his work available through digital distribution.