Better rethink that. They already know that China’s rise is due to the USA trading with them, so if they get their military back, there will be nothing to stop them turning on the USA.
Aso knows that too, which is why he came out with the reference to Nazi Germany.
I’m not too keen on the argument for allowing former WWII enemies to rearm for the sake of the USA withdrawing from the international obligations it now wants to abandon due to being (fatally?) infected with liberalism and misplaced pacifism.
I’m less worried about Japan attacking us than China. And Japan is more concerned about China attacking them than they are comforted by the thought of the USA defending them.
If Japan and China traded shots over Okinawa do you think for a moment that Obama would do anything about it? I don’t and neither do the Japanese.