- Jessie James Grelle
- Â Makoto Ogami 22 episodes, 2007-2008
- Clint Bickham
- Â Taro Komori 22 episodes, 2007-2008
- Corey Hartzog
- Â Masayuki Nakajima 22 episodes, 2007-2008
- Brittney Karbowski
- Â Miyako Komagusu 21 episodes, 2007-2008
- Chris Ayres
- Â Takahito Komagusu 19 episodes, 2007-2008
- Jay Hickman
- Â Dr. Atsui Hirata 16 episodes, 2007-2008
- Kaytha Coker
- Â Dr. Reika Otori 15 episodes, 2007-2008
- Shelley Calene-Black
- Â Kei Yakushi 13 episodes, 2007-2008
- Justin Doran
- Â Yoshiya Komori 13 episodes, 2007-2008
- Monica Rial
- Â Himeko Ogami / ... 10 episodes, 2007-2008
- Andrew Love
- Â Yasuhiro Nakajima 10 episodes, 2007-2008
- Luci Christian
- Â Sanae Ogami / ... 10 episodes, 2008
- Illich Guardiola
- Â Masato Kaibara / ... 8 episodes, 2007-2008
- Serena Varghese
- Â Inspec / ... 8 episodes, 2007-2008
- Hilary Haag
- Â Chiho Shioda 6 episodes, 2007-2008
- John Gremillion
- Â Brewer / ... 5 episodes, 2007-2008
- John Swasey
- Â Brewer / ... 5 episodes, 2007
- Greg Ayres
- Â Kazunari Honda 4 episodes, 2007-2008
- David Wald
- Â Brewer / ... 4 episodes, 2007-2008
- Leraldo Anzaldua
- Â Hiroyuki Kawamura 4 episodes, 2007-2008
- Mark Laskowski
- Â Eiichi Ooya / ... 4 episodes, 2007-2008
- Jonathan Novack
- Â Jyoji Izawa / ... 4 episodes, 2007-2008
- David Devaney Jr.
- Â Brewer / ... 4 episodes, 2007-2008
- Melissa Davis
- Â Yoshimi Iwasaki / ... 3 episodes, 2007-2008
- Andy McAvin
- Â Masateru Takabe / ... 3 episodes, 2008
- Mamiko Noto
- Â Sakie Oogura (Miyako's Teacher) 2 episodes, 2008
- Rob Mungle
- Â Seiichi Suzuki 1 episode, 2007
- Blake Shepard
- Â Michio Hoshino 1 episode, 2007
- Maggie Flecknoe
- Â Aya Komagusu 1 episode, 2007
- Joanne Bonasso
- Â Noriko Kabata 1 episode, 2007
- Chris Hutchison
- Â Genma Saruta 1 episode, 2007
- Saori Hayami
- Â Female Elementary School Student A 1 episode, 2008
- Yôko Hikasa
- Â Female Elementary School Student B 1 episode, 2008
- Jun Fukuyama
- Â Masayuki Nakajima unknown episodes
- Kenshô Ono
- Â Taro Komori unknown episodes
- Akiko Yajima
- Â Miyako Komagusu unknown episodes
- Sôichirô Hoshi
- Â Makoto Ogami unknown episodes
- Kara Greenberg
- Â Miki Komori / ... (uncredited) unknown episodes
