Junichi Saitō is a Japanese voice actor born on February 12 from Fukushima Prefecture. He is affiliated with the talent agency Production Ace. Inspired by watching anime such as Digimon and Mobile Suit Gundam, he developed an interest in the voice acting profession. He made his debut in the mid-2010s with a minor role as a student in the series Kiss Him, Not Me.

Saitō is known for his versatile voice and has built a career with a variety of roles in television anime, video games, and dubbing for foreign films and series. Two of his notable television roles include Zef in the fantasy series She Professed Herself Pupil of the Wise Man, a scout character from the Ekalrath Carillon guild, and Takumi Sonoda in the 2022 sports anime Shoot! Goal to the Future, a new series based on the classic soccer manga. His other anime credits include supporting roles in several well-known titles such as Date A Live, The Strongest Sage with the Weakest Crest, and Go! Go! Loser Ranger! where he voiced the character Konno. He has also appeared in series like Tsukipro THE ANIMATION 2, The Strongest Sage with the Weakest Crest, and contributed voice work to the theatrical film GRIDMAN UNIVERSE.

Beyond anime, his voice acting work extends to video games. He has performed notable roles in Japanese and international titles, including voicing Deadpool in Marvels Midnight Suns and appearing in Idola Phantasy Star Saga. He is also active in the dubbing scene, lending his voice to characters in popular foreign dramas and movies such as My Spy and the Korean feature Extreme Job: Rescue in 18 Days. In addition to screen work, Saitō has appeared in stage productions and live reading events, as well as digital comics.

His professional achievements are marked by his consistent work across multiple media and his ability to perform both main and supporting characters. He has also demonstrated his range by voicing multiple different characters within a single project, such as providing the voices for various soldiers, hunters, and audience members in She Professed Himself Pupil of the Wise Man. Outside of his voice work, he has stated that his special skill is singing, and his hobbies include baseball, snowboarding, and darts.