| Seiyuu | Role |
| Tomoko Kawakami | Hikaru Shindou |
| Susumu Chiba | Fujiwara no Sai |
| Sanae Kobayashi | Akira Touya |
| Yuu Asakawa | Yuuki Mitani |
| Yumi Kakazu | Akari Fujizaki |
| Kenichi Suzumura | Shinichirou Isumi |
| Reiko Takagi | Yoshitaka Waya |
| Makoto Tsumura | Kimihiro Tsutsui |
| Yoko Matsuoka | Kousuke Ochi |
| Keiji Fujiwara | Ogata-sensei |
| Eizo Tsuda | Kouyou Touya (Touya-Meijin) |
| Atsuko Enomoto | Asumi Nase |
| Hiroyuki Yoshino | Mashiba (Episode 23, 24, 28, 30, 73) |
| Satsuki Yukino | Ichikawa-san |
| Takahiro Sakurai | Toshinori Honda |
| Wasabi Mizuta | Yuuta Fukui |
| Mitsuo Iwata | Atsushi Kurata |
| Kentarou Itou | Tetsuo Kaga |
| Akeno Watanabe | Kumiko Tsuda |
| Katsuyuki Konishi | Ashiwara 4-Dan |
| Takayuki Yamaguchi | Ryo Iijima |
| Hiroshi Naka | Hikaru's Grandfather |
| Rei Sakuma | Akiko Touya (Akira's Mother) |
| Takako Honda | Hidaka (Episode 7, 9, 12, 13, 14) |
| Takahiro Sakurai | Kaoru Kishimoto (Kaio's Captain) |
| Tomomichi Nishimura | Tsubaki |
| Nobuyuki Hiyama | Shuuhei (Episode 61 - 63) |
| Yurika Hino | Hikaru's Mother |
| Eriko Kawasaki | Mitani's Sister |
| Takashi Nagasako | Dake-san (Episode 10 - 12) |
| Rokuro Naya | Kuwabara-Honinbou |
| Yukiji | Kaneko |
| Rie Ishizuka | Tamako-sensei (Episode 7, 27, 46) |
| Kenichi Ono | Kawai-san |
| Ryuji Mizuno | Holland's Representative (Episode 15 - 18, 54 - 56) |
| Akimitsu Takase | America's Representative (Episode 15 - 18, 54 - 56) |
| Katsuhiro Kitagawa | Morishita-sensei |
| Kouji Yusa | Shirakawa |
| Miyako Itou | Hong Suyong (Episode 35 - 37, 50) |
| Akimitsu Takase | Akota-san (Episode 2 & 19) |
| Daisuke Kishio | Itou (Episode 8 & 9) |
| Mayumi Asano | Okumura (Episode 8, 9, 12, 13) |
| Miki Machii | Shigeko Morishita (Episode 43) |
| Akimitsu Takase | Kadowaki (Episode 30) |
| Susumu Chiba | Hikaru's Father (Episode 75 & 2004 Special) |
| Ryuji Mizuno | Kaga's Father (Episode 4) |
| Rie Ishizuka | Tetsuo Kaga (as child Episode 4) |
| Rie Ishizuka | Kawahagi 3rd Board (Episode 5) |
| Mayumi Asano | Kawahagi 1st Board (Episode 5 & 6) |
| Akeno Watanabe | Kawahagi 2nd Board (Episode 5 & 6) |
| Masaaki Tsukada | Ooijer (Episode 54 & 55) |
| Atsuko Yuya | Chieko Sakurano (Episode 65) |