This. Colonial Asia is minimally supplied. On the other hand, most of it is minimally defended. If you've got lots of light divisions, you might be able to cover and hold ground faster.
You can get away with using the default marine division as Japan. Maybe add recon? You won't face a serious threat until you try to attack the Anglos. When forming beachheads against the Aussies, invade with marines, secure a port, and then ship in your regulars if you face stiff resistance. As long as you have naval/air supremacy the convoys won't get sunk. Let your regulars take the losses, those marines are valuable and should always be launching or planning a naval invasion. Much too valuable to slog through the outback