"My original version of the script focused on Katsura Mafune, the girl who had been turned into a cyborg by aliens from outer space. Even after she had been altered, she had emotions. As long as this idea was not removed from the script, I didn't care all that much about what was done with it."

"Tatsumi Nikamoto — Titanosaurus"

"Toru Ibuki — Tsuda, black hole alien lieutenant"

"Kenji Sahara — General Segawa"

"Tadao Nakamaru — Chief Interpol Tagawa"

"Goro Mutusmi — Mugal, black hole alien leader"

"Tomoko Ai — Katsura Mafune"

"Akihiko Hirata — Dr. Shinji Mafune"

"Akinori Umezu — boy #1"

"Katsumasa Uchida — Jiro Murakoshi, Interpol agent"

"Metal meets monster."

"Battle to save the Earth!"

"From a black hole in space…they came to conquer Earth…!"

"Haruo Nakajima — Military advisor"

"Toru Kawai — Godzilla"

"Seishiro Hisano, Ken Echiyo — SY-3 engineers"

"Keiko Miyauchi, Atsuko Takahashi, Yoshio Miyata, Ari Sagawa, Kyoko Mori, Midori Uchiyama, Wakako Tanabe, Michiko Ishii — Kilaakian"

"Katsuhiko Sasaki — Akira Ichinose"

"Kyoko Ai — Kilaaks Queen"

"Andrew Hughes — Dr. Stevenson"

"Kenji Sahara — Nishikawa, Moon Base Commander"

"Yoshio Tsuchiya — Dr. Otani"

"Ise Mori — Mechagodzilla"

"Akira Kubo — Captain Katsuo Yamabe"

"Jun Tazaki — Dr. Yoshido"

"Seishiro Kuno, Wataru Omae, Naoya Kusakawa, Yasuhiko Saijô — SY-3 astronauts"

"Yukiko Kobayashi — Kyoko Manabe"

"Shoichi Hirose — King Ghidorah"

"Monsters of mass destruction."

"The Battle Cry that Could Save the World!"

"Masaki Shinohara — Rodan"

"Kazuo Suzuki, Toru Ibuki, Susumu Kurobe, Minoru Ito — Kilaakian controlled staffers"

"The Monsters are in revolt. And the world is on the brink of destruction!!"

"Gen Shimizu — Minister of Defense"

"Yoshifumi Tajima — General"

"Nadao Kirino — Military aide"

"Takamaru Sasaki — Chairman of Earth Committee"

"Akira Kubo — Tetsuo Torii"

"Keiko Sawai — Haruno Fuji"

"Kenzo Tabu — Commander from Planet X, Earth Unit"

"Yoshio Tsuchiya — Controller of Planet X"

"Nick Adams — Astronaut Glenn"

"Akira Takarada — Astronaut Fuji"