It sounds like you didn't get the Phillipines on J1. From my experience, taking Aus and Ind on J3 is an a-symetrical result. You shouldn't be able to repeat that often. Did you get some great dice in that game? I am curious. Still, it is great when the plan works. My experience with Japan isn't anything like you describe. Congrats.
Yes, taking the Phillipenes was one of the 1st objectives I had. I did that also. I was having a great run of rolling 1's w/ the dice for infranty. On J1 I streched Japan to the max. As far as I could w/ everthing available. I think nothing but 1 x-port w/ 2 inf. from Japan was left for the non-com phase move. I took out as much British Navy as I could reach. There were a couple SZ clearing actions then landing the troops for a land assault. Taking the India Capitol on J3 was kind of a fluke as my son only left 3 tanks there. I wasn't planning it but opportunity knocked. I was able to come in the "back door" w/ 2 inf. , 2 figters & 1 bomber along w/ 2 bttleshp & 2 destyr landing shots. It worked.