I love how there's a throwaway line in Shin Ultraman where a government guy offhandedly says, "and for some reason all of the giant monsters only attack Japan!" during a conversation about other countries helping them.
In the current iteration, yes. Originally it was about how nuclear weapons fucked up Japan real good.
Yeah originally Godzilla was a metaphor for how the Bikini Atoll nuke tests fucked up Japan's food supply by killing all the fish.