Justin Cook began work in Anime dubbing more than 20 years ago as the ADR engineer on Dragon Ball Z. Since then, he has voice-directed episodes of Dragon Ball, Yu Yu Hakusho, Fruits Basket, Kiddy Grade, and the features Mass Effect: Paragon Lost & Strike Witches: The Movie. He has been a Producer since 2003 and has produced hundreds of dubs, including the 2019 theatrical film Dragon Ball Super: Broly.

His voice acting work includes the characters Eijiro Kirishima in My Hero Academia, Hatsuharu Sohma in Fruits Basket, Chiba from Beck: Mongolian Chop Squad, Captains Bellamy & Kid in One Piece, and Raditz, Super Buu & Dende in the Dragon Ball franchise, as well as Yusuke Urameshi in Yu Yu Hakusho.