“You probably don’t, but, Shinkichi, try to think about this from a higher
perspective. During the war, the atomic bomb dropped on Hiroshima blew
away an enormous city in a single instant. However, the hydrogen bombs
they’re now testing in the South Pacific are many hundreds of times more
terrible than the atomic bombs dropped on Japan. They say it’s dangerous
for people even to eat the tuna irradiated by the hydrogen bombs, but just
think—Godzilla was able to take all that radiation. If anything, it was
because of the bomb’s influence he’s as strong as he is. When I say that’s
not all that makes him so frightening, I’m not exaggerating. He’s survived
for millions for years—think about that kind of vitality! The hydrogen
bombs didn’t even faze him.

Godzilla: Godzilla in Tokyo
The Underground Laboratory