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Korea China Japan Exchange Began Since Category
Seoul Special City Beijing City Tokyo Metropolis 1995 sister cities
Gyeonggi Province Liaoning Province Kanagawa Prefecture 1996 sister/friendship cities
South Gyeongsang Province Shandong Province Yamaguchi Prefecture 1997 sister cities
South Jeolla Province Yangzhou City Karatsu City 1999 friendship/sister cities
North Jeolla Province Jiangsu Province Ishikawa Prefecture 2003 sister/friendship cities
Gangwon Province Jilin Province Tottori Prefecture 2008 sister cities
Incheon Metropolitan City Dalian City Kitakyushu City 2010 friendship/sister cities
Gunpo City Linyi City Atsugi City 2010 sister cities
Jeonju City Suzhou City Kanazawa City 2010 sister cities
Jungnang District, Seoul Special City Dongcheng District, Beijing City Meguro Ward, Tokyo Metropolis 2017 friendship/sister cities
Busan Metropolitan City Shanghai City Nagasaki Prefecture 2018 sister/friendship cities
Changnyeong Country, South Gyeongsang Province Hanzhong City Sado City 2019 friendship cities
North Gyeongsang Province Shaanxi Province Ehime Prefecture 2019 sister cities