Was Pearl Harbor the Best Target and should it have been attacked in a different way? Why were San Diego and Manila not attacked?
Reason I ask this is that whilst working out how Germany could have conducted spoof attacks, I thought of Japanese ingenuity and a better use of their resources. The minisubs that attacked Pearl could conceivably have been human torpedoes with frogmen and scuttling charges/limpet mines.
Aircraft, bombs and torpedoes are glamorous, but why not consider something less expensive in resources? Also, consider whether Japanese suicide bombers (equivalent of terrorist attacks) and saboteurs could have paralysed responses by attacking 'soft' targets. Maybe not explosive waistcoats in Congress, but certainly incendiaries and explosives in refineries and nitrate works.
In effect, a way to attack the continental United States and spread fear and despondency. Also to divert US resources in fighting the 'Enemy Within'.