Get out of Korea while you can. Korea's going to be speaking Chinese in a few decades.
Korea's only hope for survival is to play the China - Japan power balance but there's too much anti-Japanese sentiment and too little awareness of the dangers China presents.
Also, bad ties with the US, China's most likely enemy in a race for global influence isn't going to help either.
Unless you're planning on starting an insurgency before the Chinese ever show up. But that means you gotta be a real pro with explosives, firearms and other things that you can't get in Korea.