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 … Kōjirō Hongō, Kyōko Enami, Yûzô Hayakawa, Takuya Fujioka, Kōji Fujiyama, Akira Natsuki, Yoshirô Kitahara Added on Amazon Prime 2023-02-04.