It's a process that might take a few years. Though if I remember right, Japan would already have the international policy of a fascist state. I'd try to find the policy itself, [url=https://en.wikipedia.org/wiki/Statism_in_Sh%C5%8Dwa_Japan]but in short notice this is the closest I could find[/url].

But I do recall reading it involved an almost mythical belief Japan should own the four winds or something, and effectively own the world because the Shinto Gods had placed this mission onto the Emperor. Or something like this.

So yea, it's probably a political powder keg.