Read this CBC News article for an update on what's happening in Japan, politically and otherwise. It would appear that Japan may be about to renounce pacifism and develop a real military. This will not be popular with Japan's neighbors, particularly China and South Korea.
Countries which Japan occupied before and during World War II tend to have quite negative views of Japanese militarism. Japan left few friends behind in places like the Philippines, Indonesia, Malaysia, Guam, as well as China and Korea.
Oddly, one previously occupied place where Japan is somewhat well regarded today is Taiwan. Perhaps they treated the Taiwanese better than other members of their "Greater East Asia Co-Prosperity Sphere."
