As-salaam alaikum !
There is a Mosque in the northwest of Busan, the second biggest city of Korea as well as the major port of southern coast. An Islamic missionary association of Libya helped it set up in 1980. Islam was first introduced to Koreans by Turkish soldiers who had joined the Korean War to assist South Korea.
Muslims in Korea consist of few Koreans and Muslim foreigners, and their brotherhood and solidarity are very strong. They have a halal food restaurant named Kebap house just behind this Masjid.