Katsura Mafune / boy in red jacket (voices)

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

Dr. Mafune / Professor Ota / defense commander / Kusakari / Third Planet henchmen / soldiers / EAS announcer (voices)

Jiro Murakoshi / Mugal / Black Hole Planet 3 henchmen (voices)

Chief Tagawa / Captain Nakatani / Akatsuki I and II crew members (voices)

Yuichi Wakayama / Yamashita / Akatsuki I and II crew members / Third Planet henchmen (voices)

Yamamoto / boy in pink jacket / fisherman's wife (voices)