busan is the primary port for ferry service to japan and is the gateway to the Hallyeo Martime National Park and its picturesque islands. As an international port city a population of 4 million , busan has first-class hotels and restaurants to match its excellent beaches ,outstanding shopping and sightseeing areas. * from Seoul to Busan - 50min. by air, 3hrs. by KTX train, 4hrs.50min. by samaeulho train from Seoul train station. 4hrs 20min. by bus from Seoul Express Bus Terminal.