Christopher Sean as Ken Sato / Ultraman (voice)

Gedde Watanabe as Professor Sato / Ultradad (voice)

Tamlyn Tomita as Mina / Emiko Sato (voice)

Keone Young as Dr. Onda (voice)

Julia Harriman as Ami Wakita (voice)

Rob Fukuzaki as Game Commentator (voice)

Frank Buckley as Announcer / Additional Voices (voice)

François Chau as Itow-san / Additional Voices (voice)

Robert Yasumura as Kubo-san (voice)

Artt Butler as Coach Shimura / Additional Voices (voice)

Karen Yasumura as Oba-chan (voice)

Mayumi Yoshida as TV Reporter (voice)

Mila O'Malley as Chiho (voice)

Bret Marnell as KDF Flight Control / Additional Voices (voice)

Julia Kato as Umpire #3 (voice)

Brittany Ishibashi as Mrs. Onda / Additional Voices (voice)

Veronica Lapke as Akiko (voice)

Lee Shorten as Captain Aoshima (voice)

Jonathan Groff as Bunny (Ollie) (voice)

Masa Kanome as Umpire #4 (voice)

Vic Chao as Additional Voices (voice)

Paul Nakauchi as Additional Voices (voice)

Jon Ohye as Additional Voices (voice)

Hiro Nakamura as Kenji (voice)