After the previous Godzilla attack, a miniature arms race ensues to collect his cells. Concerned over Godzilla's possible return, the Japanese government uses the cells to create a new bio-weapon, ANEB (Anti-Nuclear Energy Bacteria). They seeks the aid of geneticist Genshiro Shiragami, who's experiments result in a new mutation.

Kunihiko Mitamura
as Kazuhito Kirishima

Yoshiko Tanaka
as Asuka Okouchi

Masanobu Takashima
as Major Sho Kuroki

Kōji Takahashi
as Genshiro Shiragami

Toru Minegishi
as Lieutenant Goro Gondo

Megumi Odaka
as Miki Saegusa

Toshiyuki Nagashima
as Director Seiichi Yamamoto

Ryūnosuke Kaneda
as Azuka's Father

Kazuma Matsubara
as Self Defense Forces Officer

Yasunori Yuge
as Prime Minister