I suspect what we’ll see is an anti China alliance between Korea, Japan, Taiwan, Philippines, and Vietnam as Chinese influence grows. Probably won’t be something official like NATO but it does seem to be in their strategic interest to make this happen. Especially now that US support is iffy.

And my understanding is that the current generations have less animosity.

Almost an Onion headline.

Let's not forget it's convenient for conservative parties of BOTH sides to have some red meat to throw to their country's nationalists. Normal, everyday people scarcely have the time or interaction to have strong feelings about another country whose people they don't encounter that often, independent of history. But when you stir up your constituents to unite against an out-group, you can get them out to the polls and have a nice convenient threat to accuse the other guys of being soft against. They will become real friends when the real threat from China is greater than the political benefit of using each other to keep a united nationalist wing.

now that is commendable

how was the situation till now? japan, korea and china all hate each other for some reason?