Kenichi Ono, born on January 11, 1958, in Tokyo, is a Japanese voice actor and stage actor. He is currently affiliated with the talent agency Rush Style. Ono began his career in the early 1980s, with his first credited role in the 1983 television anime Cat's Eye. Throughout his decades-long career, he has built a substantial portfolio of roles across television anime, original video animations (OVAs), and video games.

Ono's career is marked by several prominent and long-running voice roles. He is well-known for voicing the character Kouichi Takato, also known as the "Hell's Puppeteer," in the long-running mystery anime The File of Young Kindaichi and its sequel series The File of Young Kindaichi Returns. Another defining role is the sentient racing computer Asurada in the Future GPX Cyber Formula franchise, a part he played across multiple series and OVAs including Cyber Formula 11, Cyber Formula Zero, Cyber Formula Saga, and Early Days Renewal. In the Super Robot Wars OG franchise, he provided the voice for the iconic character Zengar Zombolt in both the television series Super Robot Wars OG: The Inspector and the earlier animation Super Robot Wars Original Generation - The Animation.

His extensive list of anime credits demonstrates a wide range, from supporting characters in major franchises to roles in lesser-known OVAs. He voiced the character Father in the surreal short-form series Nekojiru Gekijō and Master in the experimental film Noiseman Sound Insect. In the comedy series Cosplay Complex, he played Ikebukurou. His work also includes roles in machine-centric series such as Joe Umitsubame in the fictional in-universe anime Gekigangar 3 featured in Martian Successor Nadesico, and multiple characters in Machine Robo: Revenge of Cronos, including Devil Satan #1 and Devil Satan 6. Other notable credits include Youichi Takato in The File of Young Kindaichi, Valdes in Futari wa Pretty Cure Max Heart, and Kamome in the Soreike! Anpanman special film Minami no Umi o Sukue!.

Beyond the roles listed, Ono has had a prolific career with appearances in many popular and long-running series. His filmography includes parts in One Piece, where he has voiced several characters such as Dalton, Gin, and San Juan Wolf. He has also had roles in Digimon Savers as Tadasu Shiratori, in Hikaru no Go as Kawai, and in The First Step as Minoru Fujii. In the Pretty Cure franchise, he voiced both the character Jaku King in the first Futari wa Pretty Cure and Valdes in its sequel, Futari wa Pretty Cure Max Heart. His work spans a variety of genres, from science fiction like Mobile Suit Gundam ZZ to fantasy like聖闘士星矢Ω (Saint Seiya Omega) where he voiced the Silver Saint Dolle.