Mitsuo Iwata is a veteran Japanese actor, voice actor, and singer born on July 31, 1967, in Tokorozawa, Saitama. He began his career in the entertainment industry as a child actor in 1977 and made his voice acting debut in 1983. As of June 2019, he is affiliated with Aoni Production, having previously been associated with Office Osawa and Across Entertainment. In 2013, he won the Seiyu Award for Best Personality.

Iwata is widely recognized for one of his earliest leading roles, Shotaro Kaneda in the landmark 1988 animated film Akira. Another iconic performance from the 1990s is Kintaro Oe in the Golden Boy OVA series, a role for which he was noted to have practiced extensively to perfect the character's unique voice. He is also well-known for his long-running role as Itsuki Takeuchi in the Initial D franchise.

His career includes a wide array of supporting characters across numerous major franchises. In the 2000s, he voiced Arystar Krory III in D.Gray-Man, Sunny in Toriko, and Pyunma (Cyborg 008) in Cyborg 009 The Cyborg Soldier. He also voiced Marchosias in the Shakugan no Shana series and Emporio Ivankov in One Piece, taking over as the second voice for the character. In the 2010s and 2020s, his roles included Takaharu Fukuroda in Kill la Kill, Kuniharu Saiki in The Disastrous Life of Saiki K., and Manabu Yasui in March Comes in like a Lion.

In recent years, Iwata has continued to be active in prominent series. He voices Kiyotaka Ijichi in the global hit Jujutsu Kaisen, Zaboera in the 2020 adaptation of Dragon Quest: The Adventure of Dai, and Mosco Versa-0 in Edens Zero. He also appeared as Captain Misa Igari in Getter Robo Arc and as Lee Soleil in Lucifer and the Biscuit Hammer. Other roles from the user's list that can be confirmed in his filmography include his performances as 666 (Three-Six) in Dead Leaves, Isami Toma in World Trigger, Gen "Oyaji" Nakamura in Doki Doki School Hours, the Penguin in DC Super Heroes vs. Eagle Talon, and Toro in Magica Wars.

Beyond anime, Iwata's work extends to video games, where he is known for voicing characters like Zephel in the Angelique series, Orbot in multiple Sonic the Hedgehog games, and Sean in Street Fighter III: 3rd Strike. He has also made numerous appearances in tokusatsu live-action productions, providing voices for monsters and characters in series such as Samurai Sentai Shinkenger, Kaizoku Sentai Gokaiger, Doubutsu Sentai Zyuohger, and Mashin Sentai Kiramager. His dubbing work includes providing the Japanese voice for Peter Pan in various Disney media and Silverbolt in the Transformers: Beast Wars series.