What if Force Z went to Hawaii before Singapore?
Short answerThe route is feasible, but the result depends on why Force Z is there and whether it joins the American carriers or merely passes through.
NotesForce Z could reach Hawaii through the Caribbean and Panama Canal. Its mission would determine where it was when Pearl Harbor was attacked. A stop on the way to Singapore, intended to demonstrate links with the Americans, could leave it somewhere in the Pacific by then. A deployment to form a fast force with the US Navy would probably put it at sea with the American carriers. The scenario needs a defined mission before its consequences can be assessed.