J. Michael Tatum is an American voice actor, ADR (Adaptation Dialogue Replacement) director, and scriptwriter known for his extensive work in English dubs of Japanese anime series and video games. He has been active in the industry since 2004, primarily associated with Funimation and Bang Zoom! Entertainment.

His entry into voice acting occurred in 2005 when he encountered Funimation ADR director Christopher Bevins, who cast him as Rikichi in Samurai 7. Tatum's path to performance was shaped by a childhood speech impediment. His speech therapist encouraged him to participate in theater, where he discovered that memorizing and reciting scripts helped reduce his stuttering. This experience led him to pursue drama and stage acting before transitioning to voice work. Initially, voice acting was a side endeavor while he worked in marketing, but after being offered a directing role, he left his day job to work full-time in the industry.

Beyond acting, Tatum has contributed significantly as an ADR director and scriptwriter. His directing credits include Romeo x Juliet, Corpse Princess, and Rin: Daughters of Mnemosyne. His scriptwriting portfolio includes work on major series such as Ouran High School Host Club, Steins;Gate, Assassination Classroom, and Attack on Titan. From January 2010 to January 2014, he co-hosted the podcast That Anime Show with Terri Doty and Stephen Hoff. Since October 2018, he has co-hosted Ghoul Intentions, a ghost story podcast, with fellow voice actor Jamie Marchi.

Tatum has portrayed a wide range of characters across numerous anime series. Some of his most recognized roles include the demonic butler Sebastian Michaelis in Black Butler, the charismatic Commander Erwin Smith in Attack on Titan, the eccentric scientist Rintaro Okabe in Steins;Gate, the disciplined Tenya Iida in My Hero Academia, and the enigmatic Kyoya Ootori in Ouran High School Host Club. He also voices the character France in the Hetalia series, Tomoe in Kamisama Kiss, Rei Ryugazaki in Free!, and Eneru in One Piece. Other notable roles from the provided list include Kraft Lawrence in Spice and Wolf, Scar in Fullmetal Alchemist: Brotherhood, Acnologia in Fairy Tail, Shu Tsukiyama in Tokyo Ghoul, and Paul von Oberstein in Legend of the Galactic Heroes: Die Neue These.

Tatum's work extends to video games, where he is known for voicing Sir Hammerlock in the Borderlands franchise, Julius Kresnik in Tales of Xillia 2, Mr. Foster in Killing Floor 2, and Fernando in Paladins. He also provided the English voice for Hideki Akasaka in the 2017 Funimation dub of the live-action film Shin Godzilla.