Junji Tachibana is a Japanese voice actor affiliated with the agency Kenproduction. He was born on March 1st in Aomori Prefecture and grew up in Saitama Prefecture. His path to voice acting began with a strong interest in performance, cultivated during his time in his school's drama club. He later attended Waseda University, where he continued to gain experience in theatrical productions. After graduating, he successfully passed the audition for the voice actor training school School Duo, graduating as part of its 13th class, and officially joined Kenproduction on April 1, 2013.

Tachibana's career is marked by a high volume of supporting roles across a wide range of anime television series. His work began in earnest in 2013 with appearances in productions such as Attack on Titan and Samurai Flamenco. A significant early role came in 2014 when he was cast as Yamato Sarukui, a member of the Nekoma High volleyball team, in the long-running sports anime Haikyu!!. He has reprised this role in subsequent installments of the series, including Haikyu!! Second Season, Haikyu!! To The Top, and the Haikyu!! LAND VS. AIR original video animation. His other anime credits include roles in prominent series such as JoJo's Bizarre Adventure, Magi: The Kingdom of Magic, and Demon Slayer: Kimetsu no Yaiba.

In addition to anime, a substantial portion of Tachibana's work is in voice-over for foreign films and television dramas, known as fukikae. His agency profile highlights this aspect of his career, listing major dubbing roles in films like Detroit and Alita: Battle Angel, as well as TV series such as Silicon Valley. He also contributes to animated works from other countries, providing Japanese voices for characters in series like Love, Death & Robots. His versatility extends to other media, including video games and audio dramas.

Tachibana is a graduate of the 13th class of School Duo and has been with Kenproduction since 2013. His personal interests and skills, as listed by his agency, include making a different flavored spice curry each time, playing the guitar, and speaking a faux Tsugaru dialect. He also enjoys cooking, karaoke, collecting ghost stories, and taking long walks.