Verging on What-If, but basically just a question on strategy. So, to start. Yamamoto Isoruku guaranteed the IGHQ a "big bag" at Pearl Harbor because Yoshikawa Takeo reported that the Fleet was there in greatest numbers on the weekend, and this happened regularly. To avoid this precondition for the attack I would suggest that the Fleet first be in Pearl in an unpredictable manner. Second, that some of the Fleet, when in not Pearl, show up on the West Coast of the US, at various places. Third, that the Fleet make appearances at other locations, such as the Canal Zone, Darwin, Australia, Manila Bay, etc. And lastly, that some of the Fleet sail out of sight and stay "unknown location" for irregular periods. Okay, pick that apart, please.