That, I do not believe at all.
That US alliance in East Asia, is not going to live happily ever after.
Look at what just happened. Rudd complains about the Americans are overbearing to its allies, and is abruptly told to shut up.
Is Japan and South Korea really arming for the ultimate war against their largest trading partner?
Why would they do that?
Because of Taiwan?
If mainland China attacks Taiwan, I think South Korea and Japan would be rather happy about that, that the Chinese are killing the Chinese, why would they have to get involved?
What the Americans would have us believe is foolishness. But when the foolishness goes over the top, no point in even listening. Cannot take any of that seriously.
The most serious mistake China can do, is believe that the US alliance with South Korea and Japan is rock solid like the Eastern Bloc.
That is what the Americans want us to believe, and that is what is being broadcasted via the Western media non-stop.
That old time propaganda is not going to work.
The reason Japan and South Korea will work with the US is because China is "eating their lunch," so to speak.
Advanced East Asian economies compete over the same industries - high tech., advanced manufacturing, ship building, IT, media exports, etc. China is beating Japan - and increasingly South Korea - in all of these domains. They're losing market share and orders. Their economic life lines are more and more dependent on supplying components and tools to Chinese companies, and with the shift to self-sufficiency under Xi Jinping due to national security concerns, even that line is being cut.
This is why they will fall in line behind the US - because it's in their interest to do so. China is beating them, and they have no way to address that but to knock China down, because they have neither the market size nor the capital to compete with China directly. They need the US to sabotage China, because otherwise they're toast.
Now, is there an alternative to what they're doing? Sure. They could reach an agreement with China over establishing a collaborative supply chain, where China agrees to depend on them for certain products and components, and vice versa, so they'll always have industries that they "own" and which China largely stays out of. But to do that, they'd have to abandon their alliances with the West, first, otherwise they can never be reliable components in a Chinese supply chain.
That, however, they will never do. You won't ever convince the Korean or Japanese public that they should rather be friends with China, than the West. This is because their societies are deeply infiltrated by Western media and intelligence. They have already convinced themselves of "China bad."
So they will march to the drum of inevitable war and be the front line soldiers of future Western aggression.