Junichi Saitou is a Japanese voice actor born on February 12 in Fukushima Prefecture. He is affiliated with the talent agency Production Ace. Inspired to pursue a career in voice acting by anime such as Digimon and Mobile Suit Gundam, he made his debut in the industry during the mid-2010s.

Saitou has built a career with a wide range of roles across television anime, video games, and dubbed foreign productions. In anime, he is known for his versatility, taking on both main and supporting characters in various genres. In the fantasy series She Professed Herself Pupil of the Wise Man, which aired in 2022, he provided the voice for Zef, a scout character. In the same year, he voiced Takumi Sonoda in the sports anime Shoot! Goal to the Future, a new series based on the classic soccer manga Shoot!. His other anime credits include roles in Kiss Him, Not Me, Tsukipro THE ANIMATION 2, Date A Live, The Strongest Sage with the Weakest Crest, and Go! Go! Loser Ranger! where he voiced the character Konno.

Beyond anime, Saitou's voice work extends significantly to video games and the dubbing of Western films and series. His game credits include roles in major titles such as Batman: Arkham Knight, Prey, and Idola Phantasy Star Saga. In 2023, he voiced the character Deadpool in the video game Marvel's Midnight Suns, showcasing his ability to handle internationally recognized characters. His dubbing work encompasses a variety of foreign dramas and films, including Love's Emergency Landing, the 2021 version of Gossip Girl, Poker Face, and the film My Spy.

Saitou has also demonstrated his performance skills in other media, appearing in stage productions such as Buffalo's Moon and participating in live reading events and digital comics. His film work includes contributing voices to GRIDMAN UNIVERSE and its related projects. Known for his flexible vocal range, he is capable of performing everything from background townsfolk to leading characters and comedic personalities.