MwRYum
Major
I don't think it was Japan's intention during the start of hostilities to absorb China directly into their empire. Rather it was to protect and extend the borders of Manchukuo over the rest of China and reinstall Qing rule (as a resource appendage and puppet state).
I also have heard it was rivalry between IJN and IJA that caused U.S. to enter the war. Supposedly the insubordination of the IJN attacked Pearl harbor without prior approval to divert attention and garner resources away from the Imperial Army. I forget where i got the facts though.
Then you really have to question where you read all those crap that labelled as "history", and here's a simple version for you...for its brief period of existence, "Manchukuo" was nothing more than a Japanese colony, sovereign state in name but in deed it's nothing more than a colony, Japanese controls every organ of the state; having Qing dynasty remnant like Puyi setup as "head of state" is just part of the game, and also Puyi is more malleable, then letting Manchukuo "government" to "invite" the Japanese army to stay. Reinstall Qing dynasty was never on the agenda.
As we all know, back then China was in total chaos, the only difference that the Japanese took in comparison with other colonial powers is that they were more actively want to exploit, even gobble up China if possible.
Originally, Japan's aim of expansion is north, into Russia Far East, exploiting the chaos of Stalin's Great Purge, but as we all know the cream of the Japanese army got their arse handed to them by the Soviet Red Army in Mongolia - the Japanese military overestimated themselves, the semi-mechanized IJA was more then enough to handle the pitiful Chinese warlords' armies , but the Soviets tore them apart...with the non-aggression treaty signed between USSR and Japan, the focus goes south, set the stage for Pearl Harbor and US involvement in WW2.
Enough history lesson, now let's back to topic...
There're plenty of things that put the PLAN in a disadvantage position, apart from inferior hardware would be manpower - isn't there's an old saying that it takes 100 years to build a true navy? The Japanese tried to prove otherwise with its IJN and it was subsequently smashed by the USN...still, its cadre survived and it all migrated into today's JMSDF. And not just the mindset of a blue-water navy, but all the mindset associated with a ocean power survived to this day. And eventhough Japan have not go to war for the last 67 years, they've been trained and guided by the one who has - the USN.
Whereas the PLAN, formally began a little more than 60 years ago, for the major part of its existence it's only slightly better than a coast guard, true blue-water mentality only emerged 10 years ago - of course, embark on such an endeavor require a lot of money and manpower. Still, along with hardware that's 10 years behind the curve, it's manpower suffers badly from next to no opportunity to learn from the best - certainly USN won't show its "enemy no.1" the ropes, eh? Though no longer bogged down by ideology and more pragmatic, all the PLAN could do in terms of learning was via 3rd party materials and draw up their own conclusions, or exercises that has no foreign participation...not knowing how the leading navies really thinks and fights put PLAN in sheer disadvantage.
That's why I say if there's a shooting war, it'll be all-out and nuclear, World War 3, since China can only win by turning the Japanese isles into glass.
On a side note: there has been some strong rhetoric coming from the state's newspapers in the last few days, but as any Chinese would tell you, those are just words and war of words can't win the Diaoyu Islands back, bloody and brutal war does.