John Murphy is an American voice actor known for his work in the English dubs of various anime series and films. He is recognized for providing the English voice for the character Kanzo Mogi in the Death Note franchise. His portrayal of Mogi is featured across multiple adaptations, including the Death Note television series, the live-action films, and the compilation specials Death Note Relight: Visions of a God and Death Note Relight 2: L's Successors. In addition to his work on Death Note, Murphy also voiced the character Mamoru Daichi in the anime series The Daichis: Earth Defence Family.

Beyond these specific roles, Murphy's career encompasses a wide range of voice acting credits in English adaptations of popular anime. His notable roles include Pazu and Hideo Kuze in Ghost in the Shell: Stand Alone Complex, Bokuseno in Inuyasha, and various roles in Mobile Suit Gundam 00, such as a French Assembly Member and the UN Secretary General. His filmography also includes work on series like.hack//Roots, Hikaru no Go, and Master Keaton. In addition to his anime work, Murphy has provided voices for video games, with credits including multiple characters in the game Kessen. His body of work also includes appearances in live-action television series and films, such as roles in The Irrational, Away, and Supergirl.