City Country Since Ōita Japan September 7, 1979 Pittsburgh United States September 8, 1982 Duisburg Germany October 8, 1982 Manchester United Kingdom September 16, 1986[215] Galați Romania August 12, 1987 Kiev Ukraine October 19, 1990 Khartoum Sudan September 27, 1995 Győr Hungary October 19, 1995 Bordeaux[216] France June 18, 1998 Arnhem Netherlands September 6, 1999 Cheongju South Korea October 29, 2000 Sankt Pölten Austria December 20, 2005 Christchurch[217] New Zealand April 4, 2006 Markham Canada September 12, 2006 Borlänge Sweden September 28, 2007 Kópavogur Iceland April 25, 2008 Ashdod[218] Israel November 8, 2011 Essonne (not a city but a department)[219] France December 21, 2012 İzmir Turkey June 6, 2013 Tijuana[220] Mexico July 12, 2013[221] Saratov[222] Russia August 7, 2015 Concepción[223] Chile April 7, 2016 Bishkek Kyrgyzstan November 15, 2016 Chalcis Greece May 11, 2017 Izhevsk Russia June 16, 2017 Swansea[224] United Kingdom January 31, 2018 Entebbe Uganda April 13, 2018 Bangkok[225] Thailand November 16, 2018