Akira Nakagawa (voice) / Zoologist (voice)

Akira Ichinose / Tsuda / Akatsuki I and II crew members / radio announcer / Third Planet henchmen (voices)

Professor Shiraki (voice) (uncredited)

Chief Izumida / JSDF officer / reporter (voices)

Tang Lung (voice) (uncredited)

Yukio Keuchi / Gohei (voices)