- Hiroshi Shimozaki
- Â Referee 7 episodes, 2024
- Makoto Kaneko
- Â Announcer 4 episodes, 2024
- Alejandro Saab
- Â Takeshi Momoshiro 1 episode, 2024
- Ry McKeand
- Â Ryoma Echizen 1 episode, 2024
- Kazuyuki Okitsu
- Â Alexander Amadeus 1 episode, 2024
- Kamran Nikhad
- Â Alexander Amadeus 1 episode, 2024
- Mauricio Ortiz-Segura
-  Antonio da Medanoré 1 episode, 2024
- Dio Garner
- Â Dankmar Schneider 1 episode, 2024
- Akiha Matsui
- Â Akechi 1 episode, 2024
- Richard Barcenas
- Â Jujiro Oni 1 episode, 2024
- Ivan Shibata
- Â Peter Lambiel 1 episode, 2024
- Kotomi Aihara
- Â German Tennis Academy Student 1 episode, 2024
- Hana Tamegai
- Â German Tennis Academy Student 1 episode, 2024
- Hiiro Ishibashi
- Â Henri Nobel III 1 episode, 2024
- Kayu Machida
- Â German Tennis Academy Student 1 episode, 2024
- Airi Endo
- Â German Tennis Academy Student 1 episode, 2024
- Momoko Yamafuji
- Â German Tennis Academy Student 1 episode, 2024
- Chihiro Ibuki
- Â German Tennis Academy Student 1 episode, 2024
- Kenjirô Tsuda
- Â Dodo Obando / ... unknown episodes
- Jun'ichi Suwabe
- Â Keigo Atobe unknown episodes
- Chikahiro Kobayashi
- Â Ken Lendoll unknown episodes
- Shin'ichirô Miki
- Â Antonio da Medanore unknown episodes
- Jun Fukuyama
- Â Kenya Oshitari unknown episodes
- Yoshimasa Hosoya
- Â Kuranosuke Shiraishi unknown episodes
- Bradley Gareth
- Â Ken Lendoll unknown episodes
- Daisuke Ono
- Â Kazuya Tokugawa unknown episodes
- Nobuyuki Hiyama
- Â Duke Watanabe / ... unknown episodes
- Hikaru Midorikawa
- Â Leopold Camus de Charpentier unknown episodes
- Ryôtarô Okiayu
- Â Kunimitsu Tezuka unknown episodes
- Shôtarô Morikubo
- Â Akaya Kirihara unknown episodes
- Hiroki Takahashi
- Â Eiji Kikumaru / ... unknown episodes
- Hiroki Yasumoto
- Â Houou Byoudouin unknown episodes
- Masaya Onosaka
- Â Takesi Momoshiro unknown episodes
- Mitsuki Saiga
- Â Q.P unknown episodes
- Taiten Kusunoki
- Â Genichiro Sanada unknown episodes
- Kôhei Kiyasu
- Â Kaoru Kaidou unknown episodes
- Junko Minagawa
- Â Ryoma Echizen unknown episodes
- Kenji Nojima
- Â Jusaborou Mouri unknown episodes
- Ryûnosuke Watanuki
- Â A.Frankensteiner unknown episodes
- Fukushi Ochiai
- Â Dankmar Schneider unknown episodes
- Tarusuke Shingaki
- Â Eishiro Kite unknown episodes
- Daichi Endô
- Â Jujiro Oni unknown episodes
- Yôhei Azakami
- Â Michael Bismarck unknown episodes
- Eiji Takemoto
- Â Renji Yanagi unknown episodes
- Kei Hosogai
- Â Ikuto Kimijima unknown episodes
- Yuki Kaida
- Â Syusuke Fuji unknown episodes
- Takayuki Kondô
- Â Kiko Valentin / ... unknown episodes
- Chiharu Sawashiro
- Â Elmar Siegfried unknown episodes
- Eisuke Tsuda
- Â Hiroshi Yagyu unknown episodes
- Tomoya Itô
- Â Berti B. Volk unknown episodes
- Yû Sugimoto
- Â Kintaro Toyama unknown episodes
- Sachiko Nagai
- Â Seiichi Yukimura unknown episodes
- Hiroki Aiba
- Â Kanata Irie unknown episodes
- Kentarô Tone
- Â Jurgen Borisovich Volk unknown episodes
- Toshiyuki Kusuda
- Â Ryo Shishido unknown episodes
- Naru Kawamoto
- Â Alan Hopkins / ... unknown episodes
- Naozumi Takahashi
- Â Bunta Marui unknown episodes
- Asaki Takase
- Â Genichiro Sanada (young) unknown episodes
- Yusuke Katayama
- Â Atsukyo Tono unknown episodes
- Takafumi Kawakami
- Â Tsukimitsu Ochi unknown episodes
- Yuuki Masuda
- Â Masaharu Nio unknown episodes
- Takaaki Aihara
- Â Ryuji Omagari unknown episodes
- Ryûji Kamiyama
- Â Shuji Tanegashima unknown episodes
