Non-Historian Doubts

Imagine how powerful Japan would be today if they hadn't recieved so much damage from Godzilla, Gamera, Mothra and all those other giant monsters of the fifties. Sure, they got the best out of the Korean War, supplying bases and doing trades, watching their income go up 300% in five years and all that. But if the giant monsters hadn't been attacking them all the time, Japan would probably be ruling the world by now!
I've been looking for data on this on all my history books(like this one), but not a single mention is made of Godzilla. I don't get it. Must be some old cold-war plot, or something to do with secret CIA documents, etc.
Bah.