Noboru Kaneko as Yoshito Chûjô

Miho Yoshioka as Pilot Azusa Kisaragi

Mitzuki Koga as Mechagodzilla Operator Kyôsuke Akiba

Hiroshi Koizumi as Dr. Shin'ichi Chûjô

Tsutomu Kitagawa as Gojira

Motokuni Nakagawa as Kiryu

Akira Nakao as Premier Hayoto Igarashi

Koichi Ueda as General Dobashi

Tatsuki Omori as Shun Chujo

Koh Takasugi as JSDF Lieutenant Togashi

Norman England as Sgt Woodyard

Yumiko Shaku as Akane Yashiro

Yûsuke Tomoi as Lieutenant Susumu Hayama

Takeo Nakahara as JSDF Chief Hitoyanagi

Naomasa Musaka as Goro Kanno

Yasuo Kurashiki as Reporter

Noriko Watanabe as Shun's Mother

Kōji Shimizu as Isao Akiba

Masami Nagasawa as Shobijin

Chihiro Ohtsuka as Shobijin

Masaaki Tezuka as Scientist in monster DNA repository (uncredited)