You should assume that if it’s such a crippling blow for Japan to lose it’s airforce on round 1 then Japan probably ought not to do it.
It’s debatable how many units you can get there past 1 round in the future, the point is you only build 3 land units/round and the Japs with 4 transports at the start of round 2 can get 8 land units per round to bear. If you have to build ftrs in england and fly them to India for protection it’s a losing battle. Land units win land battles.
I don’t doubt you can be a thorn in the side of Japan but you may find that if you split up the Brit forces you end up with 2 forces neither of which can project enough power to do much.
Building land units in England, moving them to Norway gets them to India but a few turns later is all. No building a factory and AA so that’s 20 IPC of equipment you’re ahead.
BB