OOC: *ignores Straha*
IC:
You know, I hate n00bs with their overly bland and broad questions. I mean, what do you suppose should happen instead?
But, well, lets answer as broadly: Eventually, somebody will get Australia. If not Japan, then some european or other East Asian power. But, wether that be Spain, HREGN, France, England, Spain, United Belgium, the Netherlands, Poland or even the Ottomans or Papal Colonial Mission - well that would depend on awfully lot, no?
And, to be blunt - wether it be Europeans or East Asians or the Japanese, the native cultures of Korea, Australia, NZ and all thos eother islands would probably at best survive in fragments, as IOTL, too. So, there wouldnt be much change in that.
Now, as for Japan - it would have lots of trouble with over-population and an agitating warrior class. Also, without those conquests and explorations, prejudices against the merchant caste would probably remain. Though I would like to see a world without the International Guild of the Merchant Caste, heh, for Japan all those changes would be no good. Probably the Civil Wars of the previous centuries would just go on. Of course, such wars tend to spill over, so it is certainly possible hat some of those areas would still come under Japanese rule - however, with the stiff European colonial concurrence at the time, it is unlikely Japan would ever get all that territory in a "second attempt", so to speak.