It would be nice to see Japan push in china's shit for good.I don't disagree with your overall point but you've got this one wrong. The Chinese navy isn't equipped to project any real power more than 1000 miles from port. They're trying to build it but it will be decades before they could secure the entire trade route to the Middle East.
Right now, the Japanese could completely kick their ass.
I take solace in the fact that if China invaded Taiwan, the U.S. could utterly humiliate them in a hot war.
That is, if we have the will, the leadership, and the courage.
And that's a big "if."