Greater focus on the Soviet front, Japanese causes less territorial gains in Europe. USSR wins a smaller portion of Germany and Poland decided to pass on it. When Communism collapses in 1989. No one is interested in Europe, because everyone looks to Japan for Tokyo and the fall of the Tokyo Wall . Border crossing Falls until 2007, when Poland joined the Schengen .
Other differences in the timeline
-The Soviets displaced Poles from the eastern borderlands but not resettled Germans to the German Democratic Republic (Because they do not exist) So many Germans still living in the former eastern territories of Germany, but many after the war, emigrated to work in the German (Western) and any municipality they do not constitute more than 50 % of the population. Just as OTL whole province have established an official language as a second but it is done at the municipal level (double naming signs )
-Pursuant to the Agreement between the East and the West Korea was united like Austria
It was not the Korean War
-Japan still struggling with the costs of unification and adjust the infrastructure of the North (Which looks like this OLT North Korea, East Germany) and has a large Russian minority
Sorry for my bad english