Behind the Mic: Meet the Voice Cast of Akuma-Kun!

Ichiro Umoregi
Credit: Encourage Films


Ichiro Umoregi
Credit: Encourage Films

After 30 years, Akuma-kun finally resurrects on Netflix, with Ichiro Umoregi assuming the moniker of the child genius who comes once every 10,000 years. Here are the voice actors behind Akuma-Kun's characters and some of their previous roles.

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Who Is Ichiro Umoregi’s Voice Actor?

Ichiro Umoregi is the main protagonist of Akuma-Kun. He is the newest Akuma-kun, who leads the Millennium Research Institute and deals with mysterious and strange incidents brought upon by the devils.

He uses the Solomon Flute, which allows him to bend demons according to his own will.

Yuuki Kaji is Ichiro Umoregi’s voice actor. He is best known for voicing Attack on Titan’s Eren Yeager, and most recently, he has been a part of anime shows like Undead Unluck as Rip Tristan, The Family Circumstances of an Irregular Witch as Ketts, and Bungou Stray Dogs as Saigiku Jouno.

Who Is Mephisto III’s Voice Actor?

Mephisto III
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Credit: Encourage Films

Mephisto III is Ichiro Umoregi’s half-human, half-demon partner at the Millennium Research Institute.

He deals with general housework and customer service, not to mention accounting, but he’s also fighting demons with the help of Akuma-kun’s magic circle, despite having weak magic power.

Toshio Furukawa voices Mephisto III as well as Mephisto II in the anime. He recently played Dr. Ochanomizu in Pluto, Hantengu in Demon Slayer, Piccolo in Dragon Ball Super: Super Hero, and Ataru’s Father in Urusei Yatsura.

Who Is Shingo Umoregi’s Voice Actor?

Shingo Umoregi
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Credit: Encourage Films

Shingo Umoregi is the previous generation of Akuma-kun. He once played Solomon's Flute, who partnered with Mephisto II in subjugating demons and connecting their hearts with humans.

He also fought with the 12 Apostles against demons that brought misfortunes to the world.

Yuuko Mita is Shingo Umoregi’s voice actor. Some of her voice-acting roles include Charlotte Brulee and Vinsmoke Niji in One Piece, Okami Ajihei in Gurazeni, Ibuki in Pokemon Best Wishes, Benten in Urusei Yatsura, and Sayaka Ryuujin in City Hunter.

Who Is Hina Asanagi’s Voice Actor?

Hina Asanagi
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Credit: Encourage Films

Hina Asanagi is the first client of The Millennium Research Institute to appear in the Netflix ONA. She asked Ichiro and Mephisto III to deal with a strange circumstance where five of her acquaintances died at the same time.

Yukiyo Fujii is Hina Asanagi’s voice actress. She is a veteran voice actress who has landed anime roles in Renai Flops as Yoshino Feynman, Edens Zero as Sister Ivry, Komi Can’t Communicate as Himiko Agari, and Synduality: Noir as Dolce.

Who Are the Other Voice Actors in the Akuma-Kun ONA?

Here are the other supporting voice actors in Akuma-Kun:

  • Fairouz Ai (Mitsuko Okino in KamiErabi) voices Gremory, a demon who sometimes acts upon Akuma-kun’s requests.
  • Yumiri Hanamori (Vera in Undead Girl Murder Farce) voices Mio Kazama, Sanae’s only daughter, who has a cat named Chusuke.
  • Ryouko Shiraishi (Kazue Takanashi in Wagnaria!!) voices Sanae Kazama, the landlord of the Millennium Research Institute.
  • Yara Yuusaku (Tecchin Tecchikawahara in Demon Slayer) voices Satan, the devil of all devils, who has a mysterious existence.
  • Hiro Shimono (Conny Springer in Attack on Titan) is Strofire, a mysterious being with red wings. He has something to do with Akuma-kun’s childhood.
  • Michiyo Yanagisawa (Curry-pan-man in Soreike! Anpanman) plays Etsuko Umoregi, Mephisto II’s wife and the younger sister of the first Akuma-kun.

The English dub cast of Akuma-Kun is not yet confirmed as of writing, but Iyuno-SDI Group is the anime’s dubbing studio.

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