Saint Petersburg, Saint Petersburg, Russian Federation
Arlon, Région wallonne, Belgium
Cheongju-si, Chungcheongbuk-do, Korea, Republic of
São Paulo, São Paulo, Brazil
Incheon, Korea, Republic of
Seoul, Seoul, Korea (Republic of)
Toshima, Tokyo, Japan
Düzce, Akçakoca, Turkey
Madrid, Community of Madrid, Spain
Seoul, Seoul, South Korea