The original monster movie that was a metaphor for nuclear destruction. Later released in America with added footage of Raymond Burr as a reporter.
After being awakened by a hydrogen bomb test, Godzilla trashes Tokyo. Dr. Serizawa, the scientist with the eye patch, is finally persuaded to use his destructive Oxygen Destroyer to defeat Godzilla.
Dr. Serizawa goes into Tokyo Bay in a diving suit and activates the Oxygen Destroyer which dissolves Godzilla. He then sacrifices himself so that the secret of the Oxygen Destroyer will be lost forever.
Thanks, Don P.!