This world become open yet the oneness is still limited by a certain elements of uncomfortable historical legacies, especially when it comes to considering the relationship between Korea and Japan. The two cities' story between Korea and Japan tell us about such ironical and fluctuated relations between openness and controlling, caused by unforgettable historical events in the two representative eastern asian countries (although most westerns do not recognise the Korean peninsula issues separately or found the country totally unknown).
Pusan in South Korea perhaps represents the critical issue in the Eastern Asia
http://www.economist.com/news/asia/21718504-shared-history-lots-trade-and-odd-dispute-about-stolen-statues-south-korea-and-japan-may