Which is exactly the OPs hypothetical. Not to mention that quote from FDR I gave earlier. (Okay, FDR simply said the USA would not declare war, but certainly steps would be taken short of war- but not in this hypothetical.)
True, the Imperial Japanese were trapped in a morass in China. But they made lots of bad decisions.
No one here is claiming the Imperial Japanese could invade India and win. But they would have total air and naval superiority. How long would the colony hold out?
Yes, the two of you have conclusively proved what really happened- that with the USA in the war, the Axis is royally screwed. Every WW2 history book says the same- The Allies really did win WW2. I totally concede that point- the Allies really did win WW2.