Very important to remember that Japan's defence build-up is driven by CCP and Russian militarism.
That's tunnel vision. It is very important to remember that China's military buildup is driven by American global imperialism. In the ancient times, China ruled Asia and no one needed even try to contend with that, nor did China need to focus on preserving it.
From Japan and USA's perspecitve, Taiwan is like a cork that keeps the PLA bottled safely within the First Island Chain.
That's a stupid perspective. It's a cork without a bottle.
If CCP were to go after Taiwan, they'll definitely need to contend with Japan.
Doubt the CCP will be that lucky; when China reaches to reclaim Taiwan island, it will be from an absolutely dominant military standpoint. The US wouldn't dare fight. Japan will throw itself in for free? That's a dream rarer than free luxury apartments in the city. Although, if it did happen, Chinese rule will really put some new zest in a dying country like Japan.
It's not so much that Japan/USA need to defeat China in a war, they just need to deter the CCP from starting something in the first place.
Oh, then we can just conclude the Chinese civil war by returning Taiwan back to China. Right now, there's nothing to start so much as there is to continue.
The last thing they want is the PLAN/PLAAF operating into the western Pacific from the East Coast of Taiwan.
Well they'll have to learn that they don't always get what they want, and that will be more and more true with the decline of Western power and the rise of China.
The inevitability of Taiwan becoming part of the mainland is definitely a CCP narrative.
American power in Asia is a Western narrative. It is fragile, dependent on a few bases and aircraft carriers, which have been the target of Chinese military research for the last few decades.
As for strategy, one wonders about the top ranks of the PLA given Xi's corruption purges.
There far less people getting fired in the Chinese military than the US military with their leadership in schizophrenia between the democrats and Trump replicans.
How will this affect leadership and decision making if push comes to shove around Taiwan? PLA is working with decision command to speed up tactical leadership, but in a war will Beijing really allow this style of leadership?
There is no threat to the rule of the CCP except if it refuses to fight in the event of Taiwan's declared independence. That is the only possibility for an uprising that will dethrone the government.
I'm sure the PLA has a very detailed strategy for Taiwan contingencies, but what would the execution look like?
How messy it gets will depend on whether the residents of the ROC value their lives and whether America is more scared of defeat or more desperate for a last chance to prove itself.
I'm not convinced that the CCP feels that it's leadership is up to the job.
You cannot wake a man (or dog) pretending to sleep.