If the Russian’s had occupied Hokkaido. There would have been a Socialist Republic of Northern Japan -SRNJ or a Socialist Republic of Hokkaido - SRH. Korea would have been all communist. Maybe SRNJ (SRH) merged together with a communist Korea. (This time the Koreans dominate!)
In short a different North Pacific if not a very different Pacific from what we have now.
I’ll take what we have now!
And Korea surely would have LOVED to ‘occupy’ Japan....