A few notes:
If U.S. goes full KJF AND Russia keeps all 18 inf in Amur, that’s great for Germany and Italy. You don’t actually need Japan to do great, you just need one OR the other to win. The best counter to this Allied strategy is to take Moscow and hold off the U.K.
I’m assuming you do a J1? So you get Borneo/Hong Kong, and Phillipines on J1, rest of money islands on J2. Whether you keep them after that or not is a whole other thing. Just remember the math when it comes to take them back: an island worth 4 and no NO bonus you’ll get for only 1 round isn’t worth losing a transport + more. Getting all the money islands and the bonus is probably worth losing 1 transport if you don’t need it for the next round. Once U.S. is threatening, hanging out at the Philippines is a great spot because you can hit everywhere and toss some planes on the island to help defend the waters.
One question is about your buy: Round 1 should probably include a factory for the mainland. You can still move a transport or two of Manchuria/Korea troops south and not really worry about Russia. Those 18 inf can’t attack worth a darn. Round 2 you get another factory, probably French Indo China
In fact, go ahead and empty Korea and stack Manchuria to dare Russia to take Korea. It voids the Manchuria defense pact and you can attack Russia and he gets no bonus. Just don’t hand them Manchuria because that will go to China and they’re a PIA as they’ll keep adding troops there.
So, U.S. should start being a nuisance on US3(?) and after. Maybe US 4.
One option is for Japan’s mainland troops to sell out and head to Moscow via China. If they link up with Germany/Italy there around round 5, Japan’s planes can reek havoc and clear the way for Germany. All Japan needs to do is not lose their home island.
UKPac is hopefully easy enough to keep in check. Bomb them J2 and after that have a sub or two parked off Calcutta or other convoy’able territory. They won’t be able to build much, if anything for a while.