Actually, the situation that Japan was in at the start of the war was akin to having zero resources, a completely fucked and pants-on-head stupid management, a high school student in place of Shen and Vahlen, the overseer council seemingly wanting to sabotage their own war effort, and having twenty different gun designs that all sucked and all had to be produced at the same time being given to your dudes.
Meanwhile, you had some guys in the engineering and the biotechnology research department fighting over each other and trying to submit two crappy bids, and despite the fact that they suck the overseers overrule you and force them into production, complicating your supply lines even more.
Oh and did I mention that you don't have any resources to begin with, and your factories are too small to keep up with the literal twenty different guns that you have to produce because reasons?
Yeah, that's Imperial Japan at the start of the war.
Can Beagle do it? Maybe, but then the people funding the XCOM project force Beagle to use horribly outdated human wave tactics because IT WORKED*.
(By human wave tactics I mean the stereotypical CHARGE HUMANS INTO OPEN GROUND and not the actual tactical method of using overwhelming force to completely crush your enemy. Which could work. I guess.)
So... I dunno. Maybe? Japan was so horribly outclassed that it's actually a miracle that they held out for four years.