• 
  Hiroshi Yanaka

   Goro Sasabe (1 episode, 2014)
• 
  Satsuki Yukino

   Miho Amakata (1 episode, 2014)
• 
  William Winckler

   Australian Diver (1 episode, 2014)
• 
  Kouki Miyata

   Aiichiro Nitori (1 episode, 2014)
• 
  Kenjirô Tsuda

   Seijuro Mikoshiba (1 episode, 2014)
• 
  Akeno Watanabe

   Go Matsuoka (1 episode, 2014)
• 
  Mamoru Miyano

   Rin Matsuoka (1 episode, 2014)
• 
  Jamie Marchi

   Gou Matsuoka (1 episode, 2014)

• 
  Daisuke Hirakawa

   Rei Ryugazaki (1 episode, 2014)
• 
  Tatsuhisa Suzuki

   Makoto Tachibana (1 episode, 2014)
• 
  Tsubasa Yonaga

   Nagisa Hazuki (1 episode, 2014)
• 
  Andrew Bongiorno

   Russell (1 episode, 2014)
• 
  Tellina Lee

   Lori (1 episode, 2014)
• 
  Mark J. Elias

   Australian Swimmer (1 episode, 2014)
• 
  Nobunaga Shimazaki

   Haruka Nanase (1 episode, 2014)

• 
  Lib Campbell

   Teacher (1 episode, 2014)
• 
  Yoshimasa Hosoya

   Sousuke Yamazaki (12 episodes, 2014)
• 
  Todd Haberkorn

   Haruka Nanase (12 episodes, 2013)
• 
  Johnny Yong Bosch

   Makoto Tachibana (26 episodes, 2013-2015)
• 
  Bill Brooks

  13 episodes, 2014
• 
  Satomi Sato

  Chigusa Hanamura
• 
  Jun Yokoyama

  Shota Nakagawa
• 
  Kenichi Suzumura

  Momotarou Mikoshiba