@ Captain Kiwi, I agree with your assessment, but this is a “what if discussion”.
Ofc Japan would not go very far towards Moscow, as they did not manage to conquer China. Also, the whole idea with this “what if” question is that Japan do not attack the US, this is the same concept that Germany should not attack the US.
Now, Japan marching towards Moscow is fantasy, the would die b/c of lack of logistics long before they even reached Yakut.
What if Iraq won the desert storm, I would not believe it if it happened, or US lost the war against Iraq. Not possible.
But there were some reports during 2006 that situation in Iraq was close to become a civil war, so even if no one doubted that the US would win the invading process, they could lose the occupation segment.
But remember the Vietnam war, the greatest and mightiest superpower vs a small poor country of peasants. US lost that war, who would believe it?
The difference in terrain difficulty and the experience from Vietnam and Iraq is probably one of the reasons why Nato was reluctant to engage in big scale war with many ground units vs Serbia.
I definitely agree with that Japan would lose against the US anyhow, as they would lose against Russia if they went another direction. But sometimes not even the Powell doctrine is enough for the strongest side to avoid a lost war. Sometimes the strong part gets diced.
Also Japan could invent the A-bomb, but they needed more time probably than the US was willing to give. That is another discussion though.
This is related to the A&A discussions, the game starts in 41, so if Japan should ever be an annoying threat to Stalin, Japan must have started preparations for war against Russia in 1930, if not sooner. But this scenario would not happen, b/c Japan+Germany could never be allies in the same way that US+UK was allied.