Synopsis
Gamera escapes from his rocket enclosure and makes his way back to Earth as a giant opal from New Guinea is brought back to Japan. The opal is discovered to have been an egg that births a new monster called Barugon. The creature attacks the city of Osaka by emitting a destructive rainbow ray from his back, along with a freezing spray capable of incapacitating Gamera.
Cast

Kōjirō Hongō
Keisuke Hirata

Kyōko Enami
Karen

Yūzō Hayakawa
Kawajiri

Takuya Fujioka
Dr. Sato

Kōji Fujiyama
Onodera

Shō Natsuki
Ichiro Hirata
Yoshirō Kitahara
Professor Amano

Ichirō Sugai
Dr. Matsushita

Bontarō Miake
Self-Defense Force General
Jutarō Hōjō
Self-Defense Force Commander
Kazuko Wakamatsu
Sadae Hirata

Yuka Konno
Onodera's Lover

Eiichi Takamura
Governor of Osaka
Kenichi Tani
Lee
Kōichi Itō
Metropolitan Police Superintendent-General

Hikaru Hoshi
Awaji Maru Captain
Osamu Abe
Awaji Maru Crewman
Yoshihiro Hamaguchi
Awaji Maru Crewman
Joe Ohara
Karen's Father
Tsutomu Nakata
Hayashi
Yūji Moriya
News Announcer (voice)
Gai Harada
Kishimoto
Kazuo Mori
Awaji Maru Crewman
Shin Minatsu
Awaji Maru Crewman
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