Justin Cook is an American voice actor, voice director, audio engineer and line producer who works for anime-dubbing companies Funimation and Okratron 5000. He is most noted for his work on Yu Yu Hakusho and the Dragon Ball franchise.

Beck is a Japanese manga series written and illustrated by Harold Sakuishi. It was originally serialized in Monthly Shōnen Magazine from 1999 to 2008, with the 103 chapters later published into 34 tankōbon volumes by Kodansha. It tells the story of a group of Japanese teenagers who form a rock band and their struggle to fame, focusing on 14-year-old Yukio "Koyuki" Tanaka, who until meeting guitar prodigy Ryusuke Minami was an average teen with a boring life.