Fuminori Komatsu is a Japanese voice actor born on July 23, 1978, in Tokyo, Japan. He began his career in the early 2000s and has since become known for a wide range of roles in animation and foreign-language dubbing. Before entering the voice acting industry, he aspired to be a baseball player, but a leg injury during his second year of university led him to change his path. After graduating, he worked briefly at a kimono shop and part-time at a karaoke box, where his interest in performance was sparked by observing customers on stage. Following this realization, he left his job and, with a friend's recommendation, pursued a career in acting. He is a disciple of the late renowned actor and voice actor Nozawa Nachi, alongside voice actress Aya Endo. Komatsu was previously affiliated with Office PAC and Across Entertainment, but has been a freelance voice actor since December 2016.

Komatsu has built a substantial career in anime, lending his voice to a diverse array of characters. He is perhaps best known for his role as Jean-Pierre Polnareff in the anime adaptation of JoJo's Bizarre Adventure, first appearing in Stardust Crusaders in 2014 and later in Golden Wind in 2019. His other notable anime roles include Sam Ibrahim in Great Pretender, George Lestrade in Moriarty the Patriot, Snake in Vinland Saga Season 2, Butler in Tropical-Rouge! Pretty Cure, Theo Lowe in Hero Mask, Sota Hayami in Magica Wars, Manager Imanishi in The IDOLM@STER Cinderella Girls, and Mouton in Synduality: Noir. His filmography also includes significant roles in major productions such as the teacher Takeuchi in the critically acclaimed film A Silent Voice and Tredd Furia in Kingsglaive: Final Fantasy XV. Beyond these, his career features a long list of performances in anime like Mobile Suit Gundam UC, All Out!!, and numerous others dating back to the mid-2000s.

In addition to his work in original Japanese animation, Komatsu is highly active in the field of fukikae, or Japanese dubbing, for foreign films and television series. He is the regular Japanese dubbing voice for actors Shia LaBeouf, Casey Affleck, Aaron Taylor-Johnson, and, most prominently, Oscar Isaac. For Isaac, he has dubbed the role of Poe Dameron in the Star Wars sequel trilogy, as well as performances in films like Ex Machina and Triple Frontier. He also dubbed Taylor-Johnson's Quicksilver in Avengers: Age of Ultron and Shia LaBeouf's Sam Witwicky in the Transformers film series. This extensive body of dubbing work represents a major facet of his professional output.

Komatsu's voice acting career is marked by notable recurring roles and collaborations. His portrayal of Jean-Pierre Polnareff is a signature role, which he has reprised not only in multiple anime seasons but also in several video games based on the franchise, such as JoJo's Bizarre Adventure: Eyes of Heaven and Last Survivor. He has also voiced Marvin Branagh in the 2019 remake of the video game Resident Evil 2. In the gaming world, he is also known for his role as the manager Imanishi in The IDOLM@STER Cinderella Girls games. His work has led to frequent collaborations with fellow voice actors like Yuichi Nakamura and Daisuke Ono. A versatile performer, Komatsu's interests include watching sports, playing golf and baseball, and climbing, and he stands 172 cm tall.