From: PDX (and now) London, UK
It took me until November 1943 to eliminate China, that's not exactly "mid 1943" and it requires more than simply attacking. It requires the commitment of forces that would otherwise be used elsewhere and a substantial supply commitment.
The idea that what the Japanese needed to do to conquer China was to start a new war against the US and UK (+Commonwealth) is ridiculous. If anything a conquest of China at all constitutes more proof that the Japanese are not bound by realistic supply constraints
Prior to Dec. 7th 1941, the Japanese were hoarding war materials, conquering Thailand and preparing 12 divisions for operations in the DEI, Luzon, and Malaysia. I doubt that you have ever played Japan and have no idea what you are saying. In scenario 1, Japan is absolutely limited by supply and significantly so. The supply use to conquer China is enormous and a full-scale offensive in China that lasts through 1943 nearly precludes any 2nd tier Japanese movements into India or Australia, unless the allied player is very careless and somehow allows Japan to capture enormous amounts of supply in India with a limited Indian offensive, which would be bad play by the allied player.
The game was carefully designed to allow the Japanese player sufficient flexibility to choose 1 2nd-tier attack and no more. This is based upon historical parameters. That many Japanese players choose China is a strategic decision, not a game-design flaw. In the actual war, Yamamoto proposed, in March 1942, 2nd-tier landings in Ceylon and CentPac, with the objective of capturing the Hawaiian islands. The High Command rejected his proposals as too bold and risky. The Midway operation was a reduced version of Yamamoto's original plan. Japan's 2nd tier offensive never occurred in the real war because of Midway and because Yamamoto's plan was rejected by an overly cautious Japanese High Command.
What is more, Japan did launch an offensive in China in 1944. The historical name of this operation was Ichi-go. By then, however, Chiang Kai Shek's army was in mcuh better condition than in 1942, having received training, equipment, and supplies from British and U.S. forces in India. So, the idea that Japan was so constrained by supply that they could not launch a Chinese offensive is counter-factual.
If you want to play scenario 2 or some other modification that bolsters Japan, do not complain about Japan having enough supply to remain on the offensive on multiple fronts. That is the entire purpose of these mods, and I think that you are basing your opinions about the game on PBEM AARs for scenario 2 games and other mods that bolster Japan.
Well, I don't buy that the Japanese could have conquered all of China in the war in any situation. I've read a bit on it and the real issue with defending China wasn't just supply, but getting local 'warlords' to comply with Chaing's orders. If the Japanese started to take them on directly, they'd have a lot more incentive to fight back and use their resources to fend off the Japanese either directly or in a behind the lines guerrilla war.
The IJA would have a problem holding all of the conquered territory once it was taken, but more importantly China didn't have the necessary resources and oil the Japanese so badly needed. The areas they did hold could supply a lot of what China had to offer, so there wasn't much need early on to o farther forward. Later, when US forces were there, it was more important to try to the away airfields and Allied positions.
In game players have actually taken all of China and still had time to go forward, most famously in rader vs GreyJoy, where rader took all of china and then most of India. The gpace of a non-SL game allows this. Playing DBB it's much harder.
"Success is the ability to go from one failure to another with no loss of enthusiasm." - Winston Churchill