I see your point but I still don't think the issue is with too many units. The issue is based in a number of things. As this is an economy thread, lets try to keep it to the economy. As JWE pointed out, there is just too much supply flowing from the western map edge. This needs to be changed. Perhaps he is right about removing industry from those areas not likely to be conquered by the Japanese (southern Oz, Western India, Hawaii, Alaska, etc.) Yes, there were resources available there and some industry but it wasn't industry that would produce war materials. Thinking about it, I am going to stop there because that is a very big thought.
Australia produced a sizeable amount of war material (among other things: 3.7in AA guns, 25pdr QF guns, Bren Carriers, Armoured Cars, trucks, airplanes, rifles) as did India (among other things: trucks, wheeled carriers, armoured cars, rifles - India alone did produce more trucks than Japan, btw.). Austalia and India did not produce tanks and only a low number of planes mainly because the war economy of the British Empire worked differently (it would not have been very efficient to produce everything everywhere). The fact remains that Australia and India (and to some degree even NZ) produced sizeable amounts of war material. Btw., Tata Steel Works at Jamshedpur was one of the biggest steel manufacturers of the world even in the 1940s and the ingot-steel output of India was about 1.4 million tons in 1942, finished steel slightly less than 1.0 million tons.
Quite right, K. However, the Allies don’t really need HI and LI. All their armaments and vehicles and ships and planes and bears, oh my, are done by the build rates and pool numbers and just appear (poof! et voila! – non?).
So it seems that HI and LI (and refineries) are there as capture prizes; but that begs another question. Could Japan have used any of the armament factories, steel mills, etc.. if they were captured? Refineries, sure; and some LI, too. But they would have needed the technical/industrial infrastructure of the captured place, or exported its own technical and industrial means, to get any kind of service out of a captured industrial center.
So, what does all this vaporing really mean? Well, it means that, in certain circumstances, Japan can capture a self contained, self sustaining, economy that does not require much in-coming transport. Burma has oil, resources, refineries and LI. It can make as much fuel as it has oil, so it’s a monster gas station for any IJN ops west of Singers. It also makes 340 supply points per day (from refineries and LI).
The DEI is even more self sustaining, since they have more refineries, more LI and even HI. The DEI produces over 2000 supply, per day (refineries and LI) and contributes ~ 80 HI points to the pool, which is enough to run a 12 point vehicle assembly plant in Maizuru, without requiring any transport. And the gas stations are more than monstrous.
So there is a, basically, freeby, side-bar economy running in the captured areas, which actually reduces the “marginal” transportation components necessary to support them. Since they are, in large measure, self sustaining, what happens is they become the local source “from which all things flow”. The only requirements on the transport fleet is to schlep in enuf EXCESS fuel to keep the Home Islands HI factories running, and enuf EXCESS oil to keep the Home Islands refineries running.
But keeping the Home Islands refineries running don’t mean much because of the refinery capacity in the captured areas. Don’t matter where the fuel is made, if you utilize all the refinery capacity in the DEI to make gas, you need only ship the EXCESS oil to Japan, and let their refineries suck hind teat (as it were). Similarly, only EXCESS supply requirements need to be shipped into the conquered areas, but certain of the conquered areas produce supply in excess of their requirements and can therefore short-haul their excess to a near neighbor, consequently reducing the stress on the transport fleet.
The more Japan conquers, the “marginally” fewer merchies it needs. It’s a monster Ponzi scheme – the more they get, the more they “can” get, until of course the cliff (poof!, et voila, she is naked, non?).