Kentaro Sakaguchi is a Japanese actor and model who has primarily built his career in live-action film and television, with limited credits in anime voice acting. Born in Tokyo on July 11, 1991, he began his career in the entertainment industry as a model, debuting in the magazine Men's Non-no in 2010. He transitioned to acting in 2014 with a role in the film Shanti Days 365 Days, Happy Breath and is affiliated with the talent agency Tristone Entertainment. His work as a live-action actor includes leading roles in films such as The 100th Love with You and the television drama Signal.

Sakaguchi's filmography includes voice acting roles in animated projects. In 2018, he contributed voice work to the anthology film Modest Heroes, produced by Studio Ponoc. This film is composed of three short segments, and Sakaguchi provided voices for characters in the project. The following year, in 2019, he voiced the character Prince Henry in the CGI animated film Dragon Quest: Your Story, which is based on the popular video game Dragon Quest V. These voice roles are noted as part of his broader body of work, which consists almost entirely of live-action performances. His achievements in the entertainment industry have been recognized with several awards, including the Newcomer of the Year award at the 41st Elan d'or Awards and the 40th Japan Academy Film Prize for his live-action performances.