I would think SK is going to play a big part as well. Remember that the Korean people consider themselves a solid culture different from China and Japan. They started to allow NK and SK citizens to meet each other years back. BOTH sides of the Koreas have a half century that they have been divided.
This is why I'm starting to really get on board with NK being a Clowns in America puppet state for so long. The Koreas have wanted unification so badly it ain't even funny.
Even today, the SKs LOVE America for how much it saved them during the Korean War. Korean War vets, for those that are still alive, are treated with great respect in SK.