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.
Kōjirō Hongō
Kyōko Enami
Yūzō Hayakawa
Takuya Fujioka
Kōji Fujiyama
Shō Natsuki
Yoshirô Kitahara
Ichirō Sugai
Bontarō Miake
Jutarō Hojo
Kazuko Wakamatsu
Yuka Konno
Eiichi Takamura
Kenichi Tani
Kōichi Itō
Hikaru Hoshi
Osamu Abe
Yoshihiro Hamaguchi
Joe Ohara
Tsutomu Nakata
Yūji Moriya
Gai Harada
Kazuo Mori
Shin Minatsu
Toichiro Kagawa
Teruo Aragaki