Godzilla

Godzilla surfaces from Tokyo Bay and enters the city, attacking Shinagawa and scattering residents from its path. Godzilla resurfaces and breaks through the fence to Tokyo with its atomic breath, unleashing a more destructive rampage across the city. The government sends paleontologist Kyohei Yamane to lead an investigation to the island, where giant radioactive footprints and a trilobite are discovered. Yamane concludes that Godzilla has been disturbed from its deep underwater natural habitat by underwater hydrogen bomb testing. He concludes Godzilla is unkillable, having survived H-bomb testing, and must be studied.