Ok, so you have 6 ground units plus planes going up against atleast 10, more like closer to 15, plus an aa gun, and maybe some of UKs planes. Rock on, that is a good trade for the allies to make.
Let me put a little disclaimer on my ‘advice’:
If, at any time, your UK planes can die by landing in a territory and not take down atleast 2 japan planes for each one you loose, or a japan transport, DO NOT LAND THEM there. Also, if you can hold India with the planes, but not without the planes, LAND THEM IN INDIA. I assume a certain level of common sense to be applied.