Master Keaton (MASTERキートン, Masutā Kīton?) is a Japanese manga series created by Hokusei Katsushika and Naoki Urasawa. It was serialized in Big Comic Original between 1988 and 1994 and ran for 18 volumes (144 chapters in total). An anime adaptation of the series aired between 1998 and 1999 in Japan on Nippon Television. A total of 39 anime episodes were produced.
Though the manga series has not been translated into English, the anime series was dubbed into English and dual-language DVDs are currently available for English-language markets. The manga's target audience was Japanese men in their 20's and 30's, a comparatively older target audience than is common for most anime series.