You should build your minor IC on French Indo China (FIC) rd #2 (must invade rd #1) or Kwangtung. I like FIC better because you can do that w/o going to war w/UK yet, and it is only two moves from Burma instead of 3 (Kwang). Both will allow you to build 3 units. By the way both of those tt have an island in the adjacent sz that you can put an air base (AB) on latter. The IC on say FIC would allow you to build ships while the island AB would allow your air units to scramble protecting the Japanese navy if you get in trouble later.
Use your air power. You can take out an entire hoard of Chinese inf and flying tiger with only 4-5 ground units, as long as you have 8-10 air units. Those 4’s (tac bmr) come in handy when paired w/ftrs. Use the new IC on FIC to pump out more ground units for India. You don’t necessarily need tanks early to take out India, (because of air power) but should build a few the round before you assault say Burma so they can catch up or for a back up plan in case dice treat you bad.
The last game I was more patient playing Japan (waited till 3rd rd to attack). It seemed to allow me to take them on one on one, concentrating my attacks better. Of course its always nice if UK attacks you first or enters China (could happen if you wait). You also need to keep a large force (navy) in the Caroline Islands to keep the US and Anz guessing. Its kinda fun watching the US squirm (well until their bigger then you anyway). Make sure if you attack say Anz from the Caroline that your not out of position to fend off the US. The one thing that is key is your air power and timing. Try to take down China ,then UK. After that you will need your air to def/attack the USA. You better not loose your planes in Asia, and turn them towards the USA asap. You should also buy transports early on, and then build more war ships. You can never have enough of either. I also like to replace planes if I loose them along the way.
Little tidbit: If you can get your air/ground stationed in Burma for a final assault on India, you can land those surviving air units on FIC. If you build an AB on FIC that same round, it would allow you to fly those surviving air units to either Caroline or Japan on your next turn. That will send the US running the other way. I did this in one game (mostly by chance) and it was cool.