Brief history lesson... while we all know about pearl harbor, few understand what led up to it. Through out history Japan and China have not gotten along very well. Prior to Pearl Harbor, Japan was once again at war with China. Japan being a country of little natural resources imported most of it's oil (75%)and other natural resources from the United States. The US had interest in China so political pressure and an embargo
on oil and other resources were placed on Japan by the U.S. Also 'quasi covert' military action was taken against Japan by the U.S. in the form of the Flying Tigers etc.. At this time Japan was so entrenched with the war in China, it felt that its very survival as a nation was threatened. Japan, though it underestimated the American resolve, still did not believe it could win a war with the U.S., but choose to attack Pearl Harbor under the reasoning that by decimating the American fleet, it would be able to acquire the resources to win its war with China. Pearl Harbor was not a result of Japanese hatred for the US or an attempt to conquer the US, it was merely a last ditch effort to obtain the resources necessary to win the war with China and maintain their existence.
So if any of you were wondering "What the hell were they thinking" now you know.... Japan attacked the US, but it was not without provocation.