From: Lamezia Terme (Italy)
I never played a Japanese full campaign due to the need of managing the production (admittedly, I do that and more in Hearts of Iron III, but because other parts of that game are simpler; the same with the boardgame version of World in Flames).
I'm reading this thread with interest, and I could give a whirl to the Japanese. Having said that, some of the suggestions here could have been automated by an AI (not a Mod, I think that the thing would need to be hard-coded) and offered to the Japanese player as an option. Obviously against a human player you need all the help that you can get, but, personally, I think that an added layer of difficulty when playing vs. the AI (you have to fight with what you get) would be welcomed.
My 2 cents
"Yes darling, I served in the Navy for eight years. I was a cook..."
"Oh dad... so you were a God-damned cook?"
(My 10 years old daughter after watching "The Hunt for Red October")