Jason Duga is an American voice actor known for his work in English dubs of anime, particularly within the Haikyu!! franchise. He is the English voice of the character Morisuke Yaku, the libero for Nekoma High School's volleyball team. Duga first took on this role in the Haikyu!! Second Season television series and continued to voice Yaku in subsequent installments, including the Haikyu!! Land VS. Air original video animation, Haikyu!! To The Top, and the animated film Haikyu!! The Dumpster Battle.

In addition to his portrayal of Yaku, Duga has voiced several other characters within the Haikyu!! universe, many of whom are also associated with Nekoma High. These roles include Yutaka Obara and Jingo Fukiage, as well as Michinari Akagi, the libero for Johzenji High. He has also provided voices for minor and background characters in the series, such as a scorekeeper, a member of the "peanut gallery," and a ball boy. Beyond the volleyball court, Duga's anime credits include the role of Atsumi in the series Shirobako.