“Of course, if we have a very strong government, particularly with strong support from the people, it is easier for us to promote our diplomacy in a drastic way,” said Shotaro Yachi, the former Japanese Vice-Minister for Foreign Affairs. “If it (the government) doesn't have a strong grounding ... we can't be so ambitious.”
This is basically the Japanese way of explaining political theater. When America asks Japan to do something, and when Japan doesn’t want to do it, Japan will waste its time on dealing with one scandal after another.
Since the end of the Vietnam War, Japan has only had two prime ministers who really had the sustained support of the Japanese public – Yasuhiro Nakasone and Junichiro Koizumi. That just goes to show you how scandal plagued and how reluctant Japan has been to follow the advice of the American government.