Makoto Ueki is a Japanese voice actor and stage actor born on April 13, 1977, in Beppu, Oita Prefecture, Japan. He began his career in the entertainment industry in the mid-1990s as a member of the theater troupe Inuccoro, which helped him develop his stage skills. His voice acting debut came in 1996 with a role in the anime Rurouni Kenshin.

Ueki has built a versatile career, providing voices for numerous anime series, video games, and theatrical productions. Among his notable roles is Sasuke, a supporting character in the anime and manga series Ginga Densetsu Weed and its sequels Ginga Densetsu Weed: Orion, Ginga: The Last Wars, and Ginga Densetsu Noah. Sasuke is depicted as a cowardly but loyal Shiba dog and a friend of the protagonist Weed. Ueki also voiced the character Yaimao in the 2005 cel-shaded anime short film Kakurenbo: Hide & Seek, a role for which he is credited in the Japanese version of the film. His other television anime roles include Kirsch in Chō Hatsumei Boy Kanipan and Colada in Chō Seimeitai Transformers: Beast Wars Neo. He is also recognized for voicing multiple characters in the long-running series The Prince of Tennis, including Masaya Sakurai and Hayashi Daisuke, as well as appearing in the OVA and film adaptations. His other anime credits span a wide range of series from that era, such as Medarot, Kochira Katsushika-ku Kameari Kōen-mae Hashutsujo (Kochikame), Dear Boys, Whistle!, Onegai My Melody, and Bikkuriman 2000. In addition to anime, his work in video games includes roles in Brave Fencer Musashi, where he voiced both Lard and Luzu, as well as contributions to games in the Captain Tsubasa and Fist of the North Star franchises.

In addition to his voice acting, Ueki has maintained a parallel career in academia and theater. He has been a core member of the Inuccoro theater troupe, performing in both original plays and stage adaptations of popular series. He has also worked as a lecturer at Human Academy and later became an associate professor in the Department of Performing Arts at Kyushu Otani Junior College. Ueki is known to work as a freelancer, not being tied to a specific talent agency, which allows him flexibility in pursuing his varied creative and educational projects.