I do not think you are correct. For millenia, there have been excruciatingly few imbalances of power (war) between China, Japan, and Korea. Here is a great video overview [0]. If he is to believed (and external sources seem to agree), Korea and Asia has been far more stable for far longer periods of time (until ~1900) than Europe and America.

Furthermore, historically Korea (through various eras) has often (or always?) extended out of the Korean peninsula further into China than it is now. So in general they've been a lot more peaceful and unified than they are today. And yes it's an ill comparison to Germany and Austria because Korea has been around far longer.