Well, you can principally ascribe North Korean poverty to U.S sanctions. If the United States had not intervened in Korean affairs, the Korean peninsula would likely be unified and possibly more affluent than it currently is. In terms of Japan, I'm not sure how well U.S hegemony worked out for them considering Japan is a U.S vassal and for all intents and purposes, has no sovereignty over its own land. America also purposefully thwarted Japan's rise by forcing Japanese companies to share crucial IP with the United States and by severely penalizing Japanese companies that threatened the dominance of U.S companies.The most egregious case of America's containment of Japan are Plaza Accords of course, which culminated in the lost decades from which Japan has yet to emerge. If you think Asian countries should continue to play second fiddle to western countries that do not want to treat Asians as equals then I don't know what to say to you. China is the last-bastion against Western adventurism, imperialism and subversion. I'm with China all the way.