@Red Viking
I agree with you completely on 3/4 points, but not on China.
Recent Chinese history is one mainly of internal conflict. The wars with Japan were as a result of Japanese imperialist expansionist policy. Japan were the aggressors (twice). Also, the US will be present in the region for a long time, but it has little to do with keeping peace, and everything to do with expanding power. It also becomes problematic when the Japanese population overwhelmingly want the US to withdraw its bases on Japanese soil, yet the US refuses. Also, The DPRK really aren't a threat at all. They haven't got the capacity to threaten either the US or China (although, in any doomsday scenario, they are definitely more of a threat to China).
Also, slightly disagree on Russia. They did annex land, but you can't see that in a vacuum. It was against international law, but then again, if those standards are applied, a lot of Western countries don't look so good. Also, NATO is obsolete, or should be. Its presence is an irritant, not a panacea.