Isoroku Yamamoto was born in 1884. It is interesting to note that he studied in Harvard and went to the Naval War College, he he served as Naval Attache to the United States in 1925-1928.
Items for discussion:
1. Did the US receive enough information to avoid an attack of such a nature?
2. Did Yamamoto's study of the US enable him to know the 'trends' that were likely to make his surprise attack?
3. Why did the US refuse to listen to its' generals about the fleet being stationed at Hawaii for so long?
Admiral Isoroku Yamamoto, commander-in-chief of Japan's Combined Fleet, had to be careful of his country's position in the Pacific. If he concentrated his forces too much in the Pacific islands, then the mainland would be more susceptible to attack from Europe and even the United States. Yamamoto devised a plan that involved an opening blow to the United States Pacific Fleet at the same time as their offensive against British, American, and Dutch forces in Southeast Asia. He planned to cripple the United States while he quickly conquered much of Southeast Asia and gathered their natural resources. He hoped that his attack against the Pacific Fleet would demoralize the American forces and get them to sign a peace settlement allowing Japan to remain as the power in the Pacific.
The above link gives a very good synopsis of the events leading up to the bombing of Pearl Harbor.
From a strategic point of view I believe Japan was too hasty. Yamamoto was definitely a war planner, but he unfortunately did not plan for the A-bomb. Had they (Japan) taken some land (mainly China) and then waited, then things might have blown over, but like Hitler (did not only want Poland), they were not patient enough with one or two victories... they wanted more too fast!
As for Pearl Harbor, I found it strange that the navy did not get more planes in the sky with a whole hour of time to their advantage.
It seems now, as I understand it, very difficult to assume the American Government did not know about the attack on Pearl Harbor well before
it occurred. Coded messages were intercepted but not passed on, the
Japanese spy was followed but nothing done about it, and a host of
messages sent at the time which suggest something very underhanded
was going on.
Page 8-15 of the following document looks at just some of the very cogent evidence now available which implicates individuals in the American Government
as the facilitators of the attack on Pearl Harbor for the purpose of getting America
into the War.
I think this will give credible answers to at least 2 of the 3 questions asked.