- Rikiya Koyama
- Â Mamoru Takamura 76 episodes, 2000-2002
- Kôhei Kiyasu
- Â Ippo Makunouchi 75 episodes, 2000-2002
- Steve Staley
- Â Ippo Makunouchi 75 episodes, 2000-2002
- Richard Epcar
- Â Genji Kamogawa 74 episodes, 2000-2002
- Wataru Takagi
- Â Masaru Aoki 66 episodes, 2000-2002
- Tomokazu Seki
- Â Ichirou Miyata / ... 32 episodes, 2000-2002
- Kenji Utsumi
- Â Genji Kamogawa 15 episodes, 2000-2002
- Grant George
- Â Referee / ... 14 episodes, 2000-2002
- D.C. Douglas
- Â Genji Kamogawa / ... 14 episodes, 2000-2001
- Ichirô Nagai
- Â Nekota Ginpachi / ... 13 episodes, 2002
- Mitsuaki Madono
- Â Masahiko Umezawa 9 episodes, 2000
- Paul St. Peter
- Â Mr. Yagi / ... 3 episodes, 2000-2002
- Hitomi
- Â Child 3 episodes, 2001
- Yorie Terauchi
- Â Ippo's Mother 2 episodes, 2000
- Toshihiko Nakajima
- Â Haruhiko Yagi 2 episodes, 2000
- Koichi Hasebe
- Â Takemura 2 episodes, 2000
- Shinichi Namiki
- Â Matsuda 2 episodes, 2000
- Masashi Hirose
- Â Teacher 2 episodes, 2000
- Richard Cansino
- Â Appilcant / ... 2 episodes, 2000-2002
- Peter Doyle
- Â Aoki, Doctor 2 episodes, 2000
- Beau Billingslea
- Â Yoshio Fujiwara / ... 2 episodes, 2001-2002
- Mizuka Arima
- Â Volg's Mother 2 episodes, 2001
- Keiji Fujiwara
- Â Tatsuya Kimura 1 episode, 2000
- Yukari Tamura
- Â Aikawa 1 episode, 2000
- Stephanie Sheh
- Â Young Miyata 1 episode, 2000
- Kirk Thornton
- Â Chairman Kawahara 1 episode, 2001
- Michael Sorich
- Â Volg's Coach 1 episode, 2001
- Mona Marshall
- Â Volg's Mother 1 episode, 2001
- Dave Wittenberg
- Â Suzuki 1 episode, 2001
- Dorothy Elias-Fahn
- Â Aiko Date 1 episode, 2001
- Masaya Onosaka
- Â Takeshi Sendo 1 episode, 2001
- Daisuke Sakaguchi
- Â Naomichi Yamada 1 episode, 2001
- Ellyn Stern
- Â Kimura's Mother 1 episode, 2001
- Masashi Sugawara
- Â Ricardo MartÃnez 1 episode, 2001
- Steve Kramer
- Â Mr. Yasuda 1 episode, 2002
- Sanae Kobayashi
- Â Kumi Mashiba 1 episode, 2002
- Joe Cappelletti
- Â Fujii 1 episode, 2002
- Jason Palmer
- Â Miyata 1 episode, 2002
- Steve Cassling
- Â Referee 1 episode, 2002
- Kari Wahlgren
- Â Classmate, Girl unknown episodes
- Michelle Ruff
- Â Reiko Mikami, Girl unknown episodes
- Bob Papenbrook
- Â Mr. Mikami unknown episodes
- Terrence Stone
- Â Matsuda, Kobashi's Opponent, Yajima Fan unknown episodes