japan
as japan, do not expect to be making major gains against anyone early on. the most powerful territory that you can occupy is India. if you are playing a domination game, then japan may be able to attack America, but that is not going to help in the short term. if you just stand idly by, Germany is going to fall. so what can you do? you must attack Russia in the north, and America in the pacific. if you can apply pressure to one of America’s fronts, then it will be harder for them to concentrate on Germany. attacking Russia may force him to pull troops from Germany to defending against your attacks. after you have managed to bight into Russia, then you can take china and India. your long term goals will be to neutralize all threats to your rule in the pacific, and start attacking America.