
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