self esteem or fear?

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japan maintains close economic and military relations with its key ally the united states, with the united states-japan security alliance serving as the cornerstone of its foreign policy.recently the prime minister of japan yukio hatoyama resigned. before serving, yukio hatoyama promise if it will move the military bases in japan. but that did not materialize.i am admire the japanese culture on self esteem. how your opinion? and why yukio hatoyama could not keep their promise? if anyone knows about this ?