Here is a listing of the various sister city/state relationships found in Kumamoto Prefecture. The dates listed are when the relationship began. Links to more information about specific relationships are provided when available. (Information is up to date as of February 16, 2016)

Kumamoto Prefecture
Guangxi Autonomous Region, China – May 20, 1982
South Chungcheong Province, South Korea – January 22, 1983
Montana, USA – July 22, 1982

Kumamoto City
Suzhou City, Huqiu District, Jiangsu, China – May 22, 2013
Guilin, Guangxi, China – October 1, 1979
Ulsan, South Korea – April 26, 2010
Aix-en-Provence, France – February 16, 2013
Heidelberg, Baden-Württemberg, Germany – May 19, 1992
Rome, Georgia, USA – May 29, 1995
San Antonio, Texas, USA – December 28, 1987

Yatsushiro City
Beihai, Guangxi, China – March 5, 1996

Hitoyoshi City
Abrantes, Portugal – September 26, 2009

Minamata City
Davenport, Tasmania, Australia – February 27, 1996

Tamana City
Wafangdian, Liaoning, China – October 6, 1994
Clarinda, Iowa, USA – April 3, 1996

Yamaga City
Cooma, New South Wales, Australia – November 5, 1975

Kikuchi City
Jining City, Sishui County, Shandong, China – November 15, 2006
Cheongwon County, North Chungcheong, South Korea – March 7, 2007
Gimje, North Jeolla, South Korea – October 30, 2006

Amakusa City
Encinitas, California, USA – May 29, 2006

Nagomi Town
Gongju, South Chungcheong, South Korea – September 15, 1979

Ozu Town
Arapahoe, Nebraska, USA – July 22, 1995
Hastings, Nebraska, USA – July 22, 1995
Piedade, Sao Paulo, Brazil – April 28, 1986
Salesópolis, Sao Paulo, Brazil – October 11, 1968

Oguni Town
Dengfeng, Henan, China – March 3, 1998