Masaaki Ihara is a Japanese voice actor from Osaka Prefecture, born on July 5. He is affiliated with the talent agency Ken Production. His path to voice acting began after graduating from university in Osaka, when he decided to pursue a career as an actor. To achieve this goal, he moved to Tokyo and worked at a water quality inspection company to save money while training. He is a graduate of the 15th advanced class of School Duo, a voice actor training school attached to Ken Production.

Ihara's career started in the 2010s, with some of his earliest roles appearing in 2013. Since his debut, he has built a substantial portfolio, primarily voicing supporting and guest characters across a wide range of anime television series and films. His filmography demonstrates his versatility, with credits in popular and long-running franchises such as Attack on Titan, My Hero Academia, Overlord, and Gintama. In addition to anime, his work extends to video games, where he has contributed additional voices for titles like Tales of Arise and Pokémon Masters.

In web anime projects, Ihara voiced two characters in the 2016 series Pokémon Generations, taking on the roles of both Rot and Hachiku. He has also appeared in other Pokémon-related web content, such as voicing a Guard and a Researcher in Pokémon: Twilight Wings. A notable film role includes providing the voice for Yuta Kumagaya in the 2022 animated film Drifting Home. He is also known for his skills in rugby, English conversation, and his native Osaka dialect, and he enjoys watching horror movies and listening to Showa era songs and chiptunes.