And what the army needed was the navy!
The more tanks, trucks and planes Japan churned out for war in China, the sooner they'd be jonesing for oil. Where's the oil coming from? Without it, how many paperweights do they need?
IJA required about a quarter to a third of what the navy used, and Manchukuo produced about a million tons of oil in ‘41.
I have no idea if this would’ve been enough, I suspect not.