- Takahiro Sakurai
- Â Takashi Kamiyama / ... 26 episodes, 2003-2004
- Ben Pronsky
- Â Takashi Kamiyama / ... 26 episodes, 2003-2004
- Takuma Suzuki
- Â Shinjiro Hayashida / ... 24 episodes, 2003-2004
- Illich Guardiola
- Â Shinjiro Hayashida / ... 24 episodes, 2003-2004
- Adam Jones
- Â Additional Voices / ... 24 episodes, 2003-2004
- Allen Divers
- Â Additional Voices 24 episodes, 2003-2004
- Paul Oddo
- Â Additional Voices 23 episodes, 2003-2004
- Ernie Manouse
- Â Additional Voices / ... 21 episodes, 2003-2004
- Norihisa Mori
- Â Takeshi Hokuto / ... 20 episodes, 2003-2004
- Quentin Haag
- Â Additional Voices 20 episodes, 2003-2004
- Chris Nelson
- Â Additional Voices 20 episodes, 2003-2004
- George Manley
- Â Additional Voices / ... 19 episodes, 2003-2004
- Tetsu Inada
- Â Akira Maeda / ... 17 episodes, 2003-2004
- Andy McAvin
- Â Akira Maeda / ... 17 episodes, 2003-2004
- Rob Mungle
- Â Additional Voices / ... 16 episodes, 2003-2004
- Ryô Naitô
- Â Yutaka Takenouchi / ... 15 episodes, 2003-2004
- Akio Suyama
- Â Hokuto's Lackey / ... 15 episodes, 2003-2004
- Tomoyuki Shimura
- Â Baddy C / ... 15 episodes, 2003-2004
- John Swasey
- Â Additional Voices / ... 15 episodes, 2003-2004
- Chris Ayres
- Â Additional Voices / ... 15 episodes, 2003-2004
- Tommy Drake
- Â Narrator 15 episodes, 2003-2004
- Afshar Kharat
- Â Additional Voices 15 episodes, 2003-2004
- Brandon Scott Peters
- Â Additional Voices / ... 15 episodes, 2003-2004
- Christopher Kring
- Â Additional Voices / ... 15 episodes, 2003-2004
- Masahiro Okazaki
- Â Baddy B / ... 14 episodes, 2003-2004
- Jason Douglas
- Â Takeshi Hokuto / ... 14 episodes, 2003-2004
- Luci Christian
- Â Additional Voices / ... 14 episodes, 2003-2004
- Greg Ayres
- Â Hokuto's Lackey 14 episodes, 2003-2004
- Chris Stewart
- Â Additional Voices 14 episodes, 2003-2004
- Takahiro Yoshimizu
- Â Baddy B / ... 13 episodes, 2003-2004
- Blake Shepard
- Â Additional Voices 13 episodes, 2003-2004
- Norio Wakamoto
- Â Shinichi Mechazawa / ... 12 episodes, 2003-2004
- Jacob A. Gragard
- Â Additional Voices / ... 11 episodes, 2003-2004
- Jason Miesse
- Â Additional Voices 12 episodes, 2003-2004
- Yuto Kazama
- Â Noboru Yamaguchi / ... 11 episodes, 2003-2004
- Ty Mahany
- Â Additional Voices / ... 11 episodes, 2003-2004
- Jay Hickman
- Â Shinichi Mechazawa / ... 9 episodes, 2003-2004
- John Gremillion
- Â Yutaka Takenouchi / ... 9 episodes, 2003-2004
- B.G. Donna
- Â Additional Voices / ... 8 episodes, 2003
- Mika Kanai
- Â Beta Mechazawa / ... 8 episodes, 2003-2004
- Yûji Ueda
- Â Jun Ishikawa / ... 8 episodes, 2003-2004
- Takaya Kuroda
- Â Masked Takenouchi / ... 8 episodes, 2003-2004
- Matt Greenfield
- Â Additional Voices 8 episodes, 2003
- Matthew Crawford
- Â Additional Voices 8 episodes, 2003
- Fred Walters Jr.
- Â Additional Voices 8 episodes, 2003
- Daiki Nakamura
- Â Baddy A / ... 7 episodes, 2003-2004
- James Faulkner
- Â Noboru Yamaguchi 7 episodes, 2003-2004
- Megumi Hayashibara
- Â Maeda's Mother / ... 5 episodes, 2003-2004
- Adam Conlon
- Â Additional Voices / ... 5 episodes, 2003-2004
- Hilary Haag
- Â Additional Voices / ... 4 episodes, 2004
- Dwight Clark
- Â Additional Voices 4 episodes, 2004
- Sam Saletta
- Â Shoji / ... 3 episodes, 2003-2004
- Mike MacRae
- Â Pootan / ... 3 episodes, 2003-2004
- Nobuyuki Hiyama
- Â Pootan 2 episodes, 2003-2004
- Ken'ichi Suzumura
- Â Makio Tanaka 2 episodes, 2004
- Masahiro Okajima
- Â Baddy C 2 episodes, 2003
- Asami Sanada
- Â Dejiko 2 episodes, 2003-2004
- Miyuki Sawashiro
- Â Nurse / ... 2 episodes, 2004
- Ayaka Saitô
- Â Gerotan 2 episodes, 2003-2004
- Akitarô Daichi
- Â Gerotan Narration / ... 2 episodes, 2003-2004
- Kira Vincent-Davis
- Â Additional Voices / ... 2 episodes, 2003
- Masami Kikuchi
- Â Ken Hirai 1 episode, 2004
- Kôichi Sakaguchi
- Â Ishida 1 episode, 2003
- Kiyoyuki Yanada
- Â Jackson Setouchi 1 episode, 2003
- Masaaki Okabe
- Â Young Man 1 episode, 2003
- Toshihiko Nakajima
- Â Pachinko Store Clerk 1 episode, 2003
- Hideyuki Umezu
- Â Akira Nakao 1 episode, 2004
- Hiroshi Yanaka
- Â Akio Takejo 1 episode, 2003
- Takeharu Ãnishi
- Â Man 1 episode, 2003
- Osamu Kobayashi
- Â Doctor 1 episode, 2003
- Tamio Ôki
- Â Jeeves 1 episode, 2004
- Kôichi Nagano
- Â Gas Station Clerk 1 episode, 2003
- Toshihide Tsuchiya
- Â President 1 episode, 2004
- Sanae Kobayashi
- Â Woman 1 episode, 2003
- Katsuyuki Konishi
- Â Employee A 1 episode, 2004
- Miyu Irino
- Â Osamu Kido 1 episode, 2004
- Hiroshi Tsuchida
- Â Masashi Sata 1 episode, 2004
- Ayumi Hatano
- Â Manuel High Baddy A 1 episode, 2004
- Unshô Ishizuka
- Â Narrator 1 episode, 2003
- Yoshihisa Hosokawa
- Â Normal Baddy E 1 episode, 2003
- Kan Tanaka
- Â Driver 1 episode, 2003
- Akio Ôtsuka
- Â Narrator 1 episode, 2004
- Tomohisa Asô
- Â Manager 1 episode, 2004
- Kyôichi Satô
- Â Manuel High Baddy B 1 episode, 2004
- Keaton Yamada
- Â Narrator 1 episode, 2004
- Fumihiko Tachiki
- Â Narrator 1 episode, 2003
- Shinji Nakae
- Â Narrator 1 episode, 2003
- Nobuo Tanaka
- Â Narrator 1 episode, 2004
- Yoshimitsu Shimoyama
- Â Baddy A 1 episode, 2004
- Wataru Hatano
- Â Baddy D 1 episode, 2003
- Shin'ichirô Ôta
- Â Narrator 1 episode, 2003
- Akimasa Ohmori
- Â Narrator 1 episode, 2003
- Banjô Ginga
- Â Narrator 1 episode, 2004
- Kunihiro Kawamoto
- Â Baddy B 1 episode, 2004
- Mitsuyo Kondo
- Â Child A 1 episode, 2004
- Bungo Uchida
- Â Sadaharu 1 episode, 2004
- Hidetoshi Nakamura
- Â Narrator 1 episode, 2004
- Nanae Katô
- Â Child B 1 episode, 2004
- Katsuya Miura
- Â Transfer Student 1 episode, 2004
- Asako Shirakura
- Â Announcer 1 episode, 2004
- Fumitoshi Miyajima
- Â Baddy D 1 episode, 2004
- Kôsuke Toriumi
- Â The Great Four Ones 1 episode, 2004
- Yûko Sasamoto
- Â Train Announcer 1 episode, 2004
- Hirotaka Kitayama
- Â Delinquent 1 episode, 2004
- Tatsuo Satô
- Â Tatsuo 1 episode, 2004
- Kunihiko Yasui
- Â Narrator 1 episode, 2004
- Ryôko Kinomiya
- Â Narrator 1 episode, 2004
- Vic Mignogna
- Â Sushi Chef's Son 1 episode, 2004
- Renata Jones
- Â Additional Voices / ... 1 episode, 2004
- Ryan LaBarge
- Â Mechazawa Shinichi (2003-2004) unknown episodes
- Doug Bouck
- Â Hokuto Takeshi (2003-2004) unknown episodes