the claims on the South China sea are patently ridiculous, but I don't think it can be compared with the senkaku islands. From what I've read China actually did have better claim over those islands prior to 1884 and immediately after WWII, but didn't assert those claims because well.. the islands were worthless. Now that they've found oil they want to roll back the clock.
I think there is a fundamental cultural difference in the way the west and China views the dispute. To the west if you found a piece of land and lived there for 100 years, it's yours - that's how the US was founded after all. But to China it's just the latest in a series of conflicts with Japan going back hundreds of years.
> To the west if you found a piece of land and lived there for 100 years, it's yours - that's how the US was founded after all
Some say the genocide of the natives also helped a lot. These kind of logic just can't be applied to the problems in Asia, where the territory disputes trace back to hundreds of years ago. It's not a west vs east thing.
It helps that China has been around for, what, millenia? During the thousand(s) of years, you can probably find a century somewhere in there that they had/enforced a claim to most pieces of land, either owning outright or controlling access to.
I think there is a fundamental cultural difference in the way the west and China views the dispute. To the west if you found a piece of land and lived there for 100 years, it's yours - that's how the US was founded after all. But to China it's just the latest in a series of conflicts with Japan going back hundreds of years.