Image source: Pew Research Centre here
Again the data is getting a bit older than the ideal, but the great graphic from the Pew Research Centre here is very revealing.
Some of the sentiments expressed have very deep roots. Some of the strongest indicators of support can possibly be traced back over a century to Japan’s stunning challenge to Western colonial powers. This assertion of Japanese self-reliance and confidence was seen in the Russian/Japanese War, subsequently gained further credence in World War 2 and was, arguably, the ultimate inspiration for many acts of national independence through Southeast Asia last century.
Another point I would note is that countries that see themselves as inferior to another tend not to go to war against that state. In contrast, powers that see themselves as equals are often locked into, at best, an endless state of friction and at worst an inevitable conflict. The comparable degrees of disdain felt among Japan, China and South Korea for each other bode poorly.
An alternative interpretation of this point is that the countries in the region who see other Asian states so far above them are betraying an ingrained sense of inferiority at the “superior” state. If this is the case, South Korea really does have a lot of image promotion work to do.
The final pont I would make is that the data may suggest that the generation that survived World War 2 really has passed into history. Little in the data above suggests a lingering resentment for the barbarity of Japanese invaders during World War 2. The exception is perhaps in South Korea and Japan, where those wounds run particularly and grieviously deep in the national psyche.
I could say a lot more here, but alas time is always the enemy of us all.