Raymond Burr

Steve Martin

Takashi Shimura

Dr. Yamane

Momoko Kôchi

Emiko Yamane

Akira Takarada

Ogata

Akihiko Hirata

Dr. Serizawa

Sachio Sakai

Hagiwara

Fuyuki Murakami

Dr. Tabata

Ren Yamamoto

Seiji

Toyoaki Suzuki

Shinkichi

Tadashi Okabe

Dr. Tabata's Assistant

Toranosuke Ogawa

President of Company

Frank Iwanaga

Security Officer Tomo Iwanaga

Sammee Tong

Dr. Yamane / Dr. Tabata / misc. characters (voices) (uncredited)

James Hong

Ogata / Dr. Serizawa / Hagiwara / misc. characters (voices) (uncredited)

Amy Iwanabe

Emiko Yamane (voice) (uncredited)