Internet in Japan

./random thought

So Japan has the fastest speed (by a long shot), and Korea's internet speeds are somewhat slower but they are essentially portrayed as taking gaming very seriously, meaning they are more likely than not more skilled. So if a Korean top player plays against a Japanese top player across the internet, it boils down to faster reaction time vs faster command speed (aka less ping, attacks/commands are executed faster). Superior skill vs superior speed.

Probably not. The connection speeds are so fast with so little distance between the countries that it very likely doesn't impact the game at all. Much different than how East/West coast can expect some slight delay at the least.