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.

• Daiei Film
• Kōjirō Hongō
• Kyōko Enami
• Yūzō Hayakawa
• Takuya Fujioka
• Kōji Fujiyama
• Shō Natsuki
• Yoshirô Kitahara
• Ichirō Sugai