On a second thought, screw both. I realized that it's October, just in time for you to go to Oktoberfest in Munich!
Japan is only the best country to come to if you know japanese really well... otherwise Korea is the better place to go if you want to site see, I hear its beautiful. Japan is really nice too, but there isnt much to do outside of seeing mt. fugi and visiting the shrines of kyoto...
I wouldn't be asking a GFX community where you should go that will determine your future but thats me.
ive never really looked at Korea, but i hope to go to Japan in the next couple of years. I would say go to Japan m8, they have alot more there than what Korea does i understand.