The most Japan could hit it with would be 4 inf, 4 planes 1 bomber.
This calculation is incorrect, as is my other post where I state that Japan can hit India with three planes, a bomber and three infantry.
The plane from the Philipines and the plane from Japan cannot reach India and land on turn one (Sea Zones count as movement, remember? And you can’t land on a territory you just conquered) Therefore, the most that can attack India on turn one, assuming that the transport from the Philipines cannot land troops in India, is 3 infantry from Burma, the fighter in Burma, the fighter from Manchuria, and the Bomber from Japan.
This force will be faced with four british infantry, a british fighter, and two russian fighters. The Japanese are outnumbered in all respects.
If you ignore pearl harbor, it becomes possible for Japanese carrier aircraft from the Carolines and Philipenes to sink the UK transport screening India and allow two extra infantry from the Phillipenes to land in India, but this allows the US Navy to consolidate and wreak havoc.
If I were playing Japan, I would pursue the transports and Infantry policy and try to take India by outproducing and outshipping Infantry to Asia. This may become possible on turn two if the US player is reluctant to retreat into India, or the Japanese can force the UK to fight alone by invading both China and Sinkiang, abandoning Burma to the UK counterattack (or reinforcing it with four infantry and aircraft).