Excellent, then. What about the Korean independence movement? As I recall, support for it was strong in schools and amongst the youth. Sorry if I am pestering, It's just going to be a major part.
I think the Korean movie 2009: Lost Memories handle it well. A modern Korea that had been part of Japan and joined in the liberties and economic successes of the postwar era would not be terribly interested in independence. The POD is that a Japanese go back in time and change the occupation policy in Korea.
Interestingly the movie didn't portray the Japanese as evil, they were just fighting for their own nation (trying to avoid WW2, which the Korean nationalists tried to stop as they wanted independence).