Well, since nations don't seem to prepare themselves for hurricanes, typhoons, volcanoes or other natural disasters, it doesn't bode well for anticipating any kaiju attack...
Hopefully, any nation with sense will treat powerful kaiju as independent powers, and try to work out what they want and see if it can be supplied while keeping the world economy in reasonable condition. For example, since Big G likes to absorb nuclear energy why not get into the habit of dumping nuclear waste in some deserted pacific island and 'encouraging' Godzilla to visit there for his needs (perhaps Miki Seagusa could help here!). That way Godzilla remains happy and has no need to visit mainlands and by his absorbing the nuclear radiation we get rid of dangerous toxic waste...
