I see a lot of different points that I can see people have done. Frankly though, as an Axis power, I’m more and more surprised to see how many people look at Calcutta as a primary target. Half the time, I actually ignore Calcutta, and focus on other targets. For example, on Japan turn 1, if they are not going to go to war with the US and the other allies right away, I only advance into china and don’t intervene with anything else. I leave a decent fleet outside of Japan, making all my groupings ready to engage wherever I need them. Japan builds a Minor IC and 2 transports turn 1. I think this should be the most common buy in order to fortify your position. Turn 2, I decide how to invade the big islands, and what to use against the United states. I will make 2 fleets; 1 that will fight the English and ANZAC resistance, and the other that will focus on securing their defense against America. I believe it’s almost better to be defensive with the Northern Japanese force, since at the end of turn 2, Japan is pretty thin. The last thing you want is United States focusing directly on Tokyo and you losing simply because you didn’t have enough to defend with.
The Money Islands are obviously important, but as some people play, they realize that the faster China is gone, the easier Asia becomes to take. As Japan, I constantly work on trying to shut China down as much as possible. I realized that Japan has much more success when trying to build units on the ground rather than at sea. IF China is eliminated, then They can redirect to Calcutta if the capital number hasn’t been reached. This forces them to step away from any kind of naval force they were going to originally build, and keep their forces on the ground.
I generally go for Sydney, because it holds a lot more strategic value (in my opinion.) When you take Sydney, you don’t have to worry about the southern forces at all, and reduces you from 3/4 fronts, to 2/3 fronts (Depending on the way you look at it.) Germany generally has an easier chance of winning, simply because they have the opportunity of throwing themselves at Russia without really thinking of what they’re going to protect themselves with IN COMPARISON. There is Immense thinking on both sides, but I find it much more difficult to keep the supply lines going with Japan, than I do with Germany.
All in all, I think that Calcutta is actually a waste of time. If you take the Philippines, Hong Kong, Sydney, and Honolulu, then you can win. This also allows you to focus more on navy, which poses a bigger threat to the US, which will stay off of Germany’s back. These are just things that I have discovered while playing the game.