One of the major issues would be article 9 that restricts the use of military overseas, which would be the main point of this article. However, the positive attitude for a change in article 9 has once declined in the past. Meanwhile, the Japanese people feel a need to participate more in the United Nations Peace Keeping Operations since they were criticized in the Gulf War for lack of participation. This movement should not be seen as a pro-American attitude, but fear against isolation from the world while under threat from China and people's demand to be part of United Nations.
You got a point there. Maybe a China-Japan-India axis in the future? Tom Clancy wrote of such in Debt of Honor. Who would have thought a China-India "strategic partnership" was possible until now? India can take over Australia, China taking over Siberia, and Japan taking over WestPac. That was the scenario envisioned by Clancy. In the same novel, suicide pilot crashed into the Capitol Building, killing POTUS and whole bunch of top officials. Who would have thought that being possible?