ORIGINAL: desicat
I have often looked at the map and wondered what Japan could threaten that the Allies would really contest, I mean to the bitter end.
I can only come up with the Hawaiian Island chain and China. An assault on HI would force the US Navy to commit in a major manner, but I don't think it is a reasonable objective. China is a lofty goal, but the commitment of assets required (if even possible) don't play to Japans strengths. I have gamed a massive commitment of air power into China in attempts to remove them from the War...only worth trying if you are looking for something different.
Japan can still go for the initial expansion but the early attrition of British air is sacrificed.
It's interesting that you think China as well. If the Allies were to contest China as forcefully as they were able, I would think British air would be very involved. When I play Allies I generally bring in a good bit of British air especially for light bombing and recon (Lysanders). The 4Es could reach many spots from India as well.
In Scen 1 it's much tougher to allocate enough air to China right away. Interestingly my opponent says he never really gives China much consideration, so that could bode well for getting a good head start there.
Hawaii, based on some tests in a recent thread, seems almost impossible to invade completely. I wouldn't even try. I might go for Johnston Is, Midway Is, the Line Islands, and other mid-Pacific areas to squash early Allied development in those areas. But i most likely won't in this game. I might go forth an conquer, but then just pull out and set up a good defensive line.
"Success is the ability to go from one failure to another with no loss of enthusiasm." - Winston Churchill