If you recall, all diplomatic efforts had to be exhausted and military action against Saddam Hussein was authorized only after China abstained from vetoing the crucial U.N. resolution 678. Today, the U.S., or any other nation for that matter, cannot unilaterally impose its will. Furthermore, the U.S. is not totally self-reliant. She relies heavily on imported oil, manufactured goods, and capital. In order to maintain the standard of living, the U.S. cannot turn a blind eye on the international scene any more than other major democracies.
People have an uncanny way of understanding what is going on.
In fact, the Japanese Foreign Ministry conducts a poll of American attitudes every year. They are right. Both countries maintain close contact at all levels. Our top leaders have met three times this year. Overseas missions are in constant touch around the world.