Going after that stack is going to stall you out even more, that was why I started putting the stack there, as bait. You are going to be really really stalled on your opening moves for a chunk of 1 IPC land, China will hemorage, and if you are bombarding the allied navy coming south is going to have more freedom to move around. On top of that you may not even be able to threaten india by turn 3.
The most dispensible things you can send out is 4 inf (3 MAN 1 JAP), an art or armour (1 JAP), and 2 fig (1 JAP 1 MAN). If you do this, it is quite dicey, a 55% chance of success with only 1.5 units remaing which means you lose a plane that is 26 or 27 IPC’s worth of material you are averaged to lose, so you still probably won’t get the 1 IPC land if you win. These are all units you are probably used to sending elsewhere on more critical land.
Taking the land is not a problem for Japan, it can throw the kitchen sink at BURY if it wanted to, it is just not worth it though. If I made the opening move I suggested and you attacked that stack and won, I would consider it a bonus (maybe even barring awful awful luck). You have less units now in more critical places, and have probably taken over less critical land. It gives the Allies a bigger playground to trip Japan up for yet another extra turn or two. Hell, I may even consider a KJF or a T1 IC build in AUS if you made that attack (doubtful, but still this is where it would happen).
But the real beauty is, if the bait is not taken (which I don’t expect it to be) it causes Japan to play more tight and conservative.