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.
as Keisuke Hirata
as Karen
as Kawajiri
as Dr. Sato
as Onodera
as Ichiro Hirata
as Professor Amano
as Dr. Matsushita
as Self-Defense Force General
as Self-Defense Force Commander
as Sadae Hirata
as Onodera's Lover
as Governor of Osaka
as Lee
as Metropolitan Police Superintendent-General
as Awaji Maru Captain
as Awaji Maru Crewman
as Awaji Maru Crewman
as Karen's Father
as Hayashi
as News Announcer (voice)
as Kishimoto
as Awaji Maru Crewman
as Awaji Maru Crewman
as Man at Observatory
as Gamera
