Undertaker in Black Butler (Kuroshitsuji) is voiced by Junichi Suwabe in the original Japanese version and John Swasey in the English dub. Suwabe’s eerie yet charismatic performance helped transform Undertaker from comic relief into one of the franchise’s most mysterious and unsettling figures, while Swasey brought the same dark humor, menace, and theatrical presence to the English adaptation. (behindthevoiceactors.com)

Junichi Suwabe – Japanese Voice of Undertaker

Date of Birth

March 29, 1972

About Junichi

Junichi Suwabe is a Japanese voice actor, narrator, and radio personality affiliated with Haikyō. Known for his deep vocal tone and commanding delivery, he has become one of the most recognizable voices in modern anime, particularly for charismatic antiheroes, villains, and mysterious supporting characters.

As Undertaker in Black Butler, Suwabe delivered one of the series’ most memorable performances. Undertaker initially appears as an eccentric funeral director obsessed with dark humor and bizarre behavior, but later emerges as one of the story’s most dangerous and emotionally complex figures. Suwabe’s performance balanced theatrical comedy with chilling menace, helping maintain the character’s mystery throughout the series.

Fans frequently praised how effectively he shifted Undertaker from bizarre comic relief to emotionally haunting antagonist without losing the character’s unsettling charm.

Outside of Black Butler, Suwabe is internationally famous for major roles in Jujutsu Kaisen, Bleach, and Fate/stay night.

Hometown

Tokyo, Japan

Career Highlights

  • Undertaker — Black Butler
  • Ryomen Sukuna — Jujutsu Kaisen
  • Grimmjow Jaegerjaquez — Bleach
  • Archer — Fate/stay night
  • Shota Aizawa / Eraser Head — My Hero Academia
  • Viktor Nikiforov — Yuri on Ice
  • Yami Sukehiro — Black Clover
  • Keigo Atobe — The Prince of Tennis

Full Current Filmography

The following list reflects documented anime, film, music, and game credits from publicly available industry sources and may not be exhaustive.

Television Anime

  • Black Butler — Undertaker
  • Jujutsu Kaisen — Ryomen Sukuna
  • Bleach — Grimmjow Jaegerjaquez
  • Fate/stay night — Archer
  • My Hero Academia — Shota Aizawa / Eraser Head
  • Black Clover — Yami Sukehiro
  • Yuri on Ice — Viktor Nikiforov
  • The Prince of Tennis — Keigo Atobe
  • JoJo’s Bizarre Adventure — Leone Abbacchio
  • Blue Exorcist — Lightning
  • Tokyo Ghoul — Shuu Tsukiyama
  • Space Dandy — Dandy

Anime Films

  • Black Butler: Book of the Atlantic — Undertaker
  • Fate/stay night: Unlimited Blade Works projects — Archer
  • Jujutsu Kaisen 0 — Ryomen Sukuna
  • Bleach film projects — Grimmjow Jaegerjaquez
  • My Hero Academia film series — Shota Aizawa

Video Games

  • Fate/Grand Order — Archer
  • Jujutsu Kaisen Phantom Parade — Ryomen Sukuna
  • Bleach: Brave Souls — Grimmjow Jaegerjaquez
  • Black Butler game adaptations — Undertaker
  • Granblue Fantasy — Various Roles

Critical Reception

Junichi Suwabe’s portrayal of Undertaker received widespread acclaim for its eerie charisma, vocal versatility, and dramatic intensity. Fans frequently highlighted how effectively he balanced Undertaker’s bizarre humor with the character’s darker emotional undercurrents and terrifying revelations later in the series.

His performance helped make Undertaker one of the most iconic and mysterious characters in Black Butler.

Our Sources

John Swasey – English Voice of Undertaker

Date of Birth

October 18, 1964

About John

John Swasey is an American voice actor, ADR director, and scriptwriter known for his extensive work in English anime dubbing with Funimation and Sentai Filmworks. Over the years, he has become especially recognized for portraying intimidating authority figures, villains, and emotionally layered older characters.

As the English voice of Undertaker in Black Butler, Swasey delivered a haunting and theatrical performance that perfectly captured the character’s unsettling blend of dark comedy, mystery, and menace. Undertaker initially appears eccentric and absurd, but gradually reveals a far more dangerous and emotionally complex side as the story progresses. Swasey’s ability to shift between bizarre humor and chilling seriousness became one of the standout elements of the English dub.

Fans frequently praised how effectively he preserved Undertaker’s eerie unpredictability while adding emotional weight during the character’s darker revelations later in the series.

Outside of Black Butler, Swasey is also widely known for major roles in Attack on Titan, One Piece, and Fullmetal Alchemist.

Hometown

Texas, United States

Career Highlights

  • Undertaker — Black Butler
  • Lord Death — Soul Eater
  • Crocodile — One Piece
  • Gendo Ikari — Neon Genesis Evangelion English productions
  • All For One — My Hero Academia
  • Van Hohenheim — Fullmetal Alchemist: Brotherhood
  • Sir Nighteye — My Hero Academia
  • Doflamingo family-related supporting roles — One Piece

Full Current Filmography

The following list reflects documented English dub acting, directing, and writing credits from publicly available industry sources and may not be exhaustive.

Television Anime

  • Black Butler — Undertaker
  • Soul Eater — Lord Death
  • One Piece — Crocodile
  • My Hero Academia — All For One / Sir Nighteye
  • Fullmetal Alchemist: Brotherhood — Van Hohenheim
  • Attack on Titan — Additional Roles
  • Tokyo Ghoul — Yoshimura
  • Parasyte -the maxim- — Additional Voices
  • Fire Force — Additional Roles
  • Noragami — Additional Voices
  • Dragon Ball Super — Additional Voices
  • Akame ga Kill! — Additional Voices

Anime Films

  • Black Butler: Book of the Atlantic — Undertaker
  • One Piece Film projects — Crocodile
  • My Hero Academia film series — All For One / Sir Nighteye
  • Fullmetal Alchemist film releases — Van Hohenheim
  • Evangelion English productions — Gendo Ikari

Video Games

  • One Piece game projects — Crocodile
  • My Hero One’s Justice — All For One
  • Black Butler game adaptations — Undertaker
  • SMITE anime collaboration appearances
  • Dragon Ball related projects — Additional Voices

ADR Direction & Scriptwriting

John Swasey has also worked extensively behind the scenes in anime localization and dubbing production.

Notable ADR and script-related work includes:

  • Black Butler
  • One Piece
  • Fullmetal Alchemist
  • Soul Eater
  • Parasyte -the maxim-

Critical Reception

John Swasey’s portrayal of Undertaker received widespread praise from English dub audiences for its eerie charisma, theatrical energy, and emotional depth. Fans frequently highlighted how effectively he balanced Undertaker’s bizarre comedic personality with the sinister undertones and tragic emotional complexity revealed later in the series.

His performance is often regarded as one of the standout supporting portrayals in the Black Butler English dub.

Our Sources

Social Media

Published by Limarc Ambalina

Limarc Ambalina is the founder of Japan Bound, a website covering all things Japan — from travel and culture to anime, manga, and pop culture. He is also the Director of Content at ISNation and the former VP of Editorial at HackerNoon. Based in Japan, he has been writing about Japanese life and entertainment since 2019, growing the site to over 2.4 million views.

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