Cold War Border Conflicts
I think we have room for an interesting flashpoint here,
If I understand correctly that Japan is ruled by a corporatist right-wing government in the Cold War and friendly with West than surely there will be border conflicts on the border with Japanese China but perhaps more specifically with Japan proper (because Korea is part of Japan at this time). I could imagine that one Korean group or another trying to move over the border (I guess South, but I am not sure, maybe north too) and that there could be border wall built on the Yalu River similar to the OTL DMZ zone.
What do you think?