Not quite yet. And it won’t exactly be the Korean War.
Think of the very early stages of WWII, how that was a result of the missteps of the Allies’ WWI victory that seethed in the region.
Japan will be England in this scenario.
The only problem is that people who hate America are running the country and they are supported by multitudes who have been brainwashed that we are evil.
So if North Korea is planning to attack South Korea, and is threatening to do same (I think they even made the nuclear threat), then at some point—like now—wouldn’t South Korea be justified to launch a pre-emptive attack. I mean, why should they wait to get hit.