The Japanese DID invade America - or at least they tried. That's what Pearl Harbor was all about. Their government had them so lashed into a frenzy that they didn't think they could possibly lose. It came as a real shock when we hit back so hard.
I thought Perl Harbour was pre-emptive? They knew USA was going to join the war sooner or later and they wanted to get a head start. I don't think they had any plans to invade USA. They had hardly troops to control what they already had conquered by 1942.