Possible Clues:

• Capital city home to Mnet headquarters
• City home to Jogyesa Temple
• World capital that's home to the Moonlight Rainbow Fountain
• Capital city with three consecutive vowels
• Dongdaemun Market's city
• City that's home to Gyeongbokgung
• Capital city home to the Noryangjin Fish Market
• Birthplace of K-pop
• Site of Hyundai’s headquarters
• Capital known as Keijo before the 1940s