Don’t let the US into the war until the last possible minute. The US will collect its income on US3 no matter what, but being able to place 10 units in either theater a turn early is bad mojo for Japan’s sea dominance.
When you make your move, take the Philippines and the DEI. Combined they allow you to corner Anzac and India UK while maintaining influence and mostly control over the DEI (your lifeblood to compete with the US economically).
Theres an added bonus that by taking the DEI you cut the economies of Anzac and India-UK while adding to yours significantly. You get that NO, you are seeing +20 IPC for Japan while cutting the allied economies by -15. Add in taking the Philippines and you -5 IPC USA for its lost NO. Thats a total IPC swing of 40 IPC for Japan in one move.
You’d be in position to take New Guinea from Anzac on your next move, cutting out 10 more IPC from Anzac for losing two NO’s by losing one territory. Effectively it puts Anzac down to 10 IPCs a turn again while its already cornered.