Katsuhiko Sasaki as Biologist Akira Ichinose

Tomoko Ai as Katsura Mafune

Akihiko Hirata as Dr. Shinzô Mafune

Tadao Nakamaru as INTERPOL Chief Tagawa

Gorō Mutsumi as Commander Mugal

Masaaki Daimon as Captain Kusakari

Katsumasa Uchida as Jiro Murakoshi

Shin Roppongi as Yûuchi Wakayama

Tōru Ibuki as Deputy Commander Tsuda

Kenji Sahara as Defense Force Commander

Kotaro Tomita as Professor Ôta

Ikio Sawamura as Mafune's Butler

Kazuo Suzuki as Alien Henchman #1

Yoshio Kirishima as Alien Henchman #2

Masayoshi Kikuchi as Alien Henchman #3

Takuya Yuki as Alien Henchman #4

Jun Nishihara as Alien Henchman #5

Akinori Umezu as Boy #1

Shizuko Azuma as Old Country Lady

Toshihiko Furuta as Interpol Worker

Takuzō Kumagai as Defense Corp Executive

Toru Kawai as Godzilla

Kazunari Mori as Mechagodzilla

Tatsumi Nikamoto as Titanosaurus

Yasuko Agawa as Yuri Yamamoto

Yasuzō Ogawa as

Hiroya Morita as

Shōichi Hirose as

Haruo Suzuki as

Saburô Kadowaki as

Shigeo Katō as

Kazuo Imai as

Toshio Hosoi as