| 1992 | Nov. | Five members of the Minamata City Council visit Devonport |
| 1993 | Jul. | The Mayor of Devonport and his wife visit Minamata |
| Oct. | Four citizens from Minamata visit Devonport |
| 1994 | Mar. | The Minamata - Tasmania Society is founded. The Minister of the Environment of Tasmania and five others visit Minamata. |
| | Sept. ~ Oct. | First Minamata-Tasmania Friendship Visit |
| 1995 | Feb. ~ Mar. | Second Minamata-Tasmania Friendship Visit. Mayors from both cities confer on the future of the cities' relationship, confirming that the exchanges are to be the beginnings of a sister city relationship. |
| | May | The Minamata International Friendship Association (MIFA) is founded |
| | May ~ Jun. | Members of the Minamata Board of Education make a preliminary visit to Devonport to investigate the possibility of sending junior high school students to Devonport for cultural exchange visits Devonport hosts a calligraphy and photo exhibition of works made by Minamata Citizens |
| | Jul. ~ Aug. | A group of junior high school students is sent from Minamata to Devonport on an international exchange mission（15 people, including chaperones） |
| 1996 | Feb. | Third Minamata - Tasmania Friendship Visit (27 members)
※ February 27, Official Ceremony to Commemorate the Establishment of Sister City Relations is held in Devonport An event is held in Devonport to introduce Minamata （Various panel displays about Minamata, as well as bamboo craftwork and pressed flower artwork, are exhibited） |
| | Apr. | A 21 member delegation from Devonport visits Minamata. On April 2nd, Minamata's Official Ceremony to Commemorate the Establishment of Sister City Relations is held. |
| | Jul. | The first Coordinator of International Relations (CIR) is employed to Minamata City（from Melbourne, Victoria, Australia) |
| | Jul. ~ Aug. | A group of junior high school students is sent from Minamata to Devonport on an international exchange mission（14 people, including chaperones） |
| 1997 | Feb. | A group of 44 citizens is sent from Minamata to Devonport on a Sister City cultural exchange mission |
| | Jul. | A CIR from Devonport is employed to Minamata City（3 years） |
| | Jul. ~ Aug. | A group of junior high school students is sent from Minamata to Devonport on an international exchange mission（15 people, including chaperones） |
| | Nov. | Bill Wilson, President of the Sister City Association in Devonport, visits Minamata |
| 1998 | Feb. | A Group of 29 citizens from Minamata visits Devonport on a sports and cultural exchange mission |
| | Apr. | A Cultural Exchange Delegation of 22 people visits Minamata from Devonport |
| | Jul. - Aug. | A group of junior and senior high school students is sent from Minamata to Devonport on an international exchange mission（17 people, including chaperones） |
| | Nov. | Sister Cities Australia (SCA) awards Minamata and Devonport the National Sister Cities Award in the category of Cultural Exchange for the Arts & Crafts exhibition in Minamata City, organized by the Devonport Sister City Association and held in April 1998 |
| 1999 | Jan. | 2 High School Students from Devonport come to Minamata Senior High School for short-term study abroad |
| | May ~ Jun. | Sister City Art Exhibit held in Minamata (Joint exhibition by the Minamata City Art Association and Devonport-born painter Owen Gower Reid) |
| | Jul. ~ Aug. | A group of junior and senior high school students is sent from Minamata to Devonport on an international exchange mission（17 people, including chaperones） |
| | Sep. | A children's chorus croup from Devonport comes to Minamata ※ (Chorus members: 47, Parents and Chaperones: 15） The chorus group has a joint concert with other chorus groups in Minamata; members of the group also have a homestay experience and visit local schools 
Minamata-Devonport Sister City Music Festival（Minamata City Culture Hall） |
| | Nov. | Minamata City welcomes Devonport City faculty to Minamata for a Local Government Authority International Exchange Seminar |
| 2000 | Jul. ~ Aug. | A group of junior and senior high school students is sent from Minamata to Devonport on an international exchange mission（17 people, including chaperones） |
| | Nov. | Sister Cities Australia (SCA) awards Minamata and Devonport the national Sister Cities Award in the category of Cultural Exchange for the children's chorus cultural exchange project in 1999 |
| 2001 | Jul. ~ Aug. | A group of junior and senior high school students is sent from Minamata to Devonport on an international exchange mission（17 people, including chaperones） |
| 2002 | Jul. ~ Aug. | A group of junior and senior high school students is sent from Minamata to Devonport on an international exchange mission（12 people, including chaperones） |
| 2004 | Feb. | Members of each city make and exchange posters to commemorate the 8th anniversary of the establishment of Sister City Relations |
| 2005 | May | Peter Hollister, Mayor of Devonport, and 9 others visit Minamata 
Socializing with residents in the Okawa area of Minamata |
| 2006 | Feb. | In Devonport, cherry tries are planted to commemorate the 10th Anniversary of the establisment of Sister City Relations |
| 2007 | Feb. | In Minamata, a time capsule is burried and an Australian tree planted to commermorate the 10th Anniversary of the establisment of Sister City Relations |
| | Mar. | Mayor Miyamoto of Minamata and 29 others visit Devonport |
| 2008 | Apr. | A thirteen member group from Devonport makes an official visit to Minamata |
| 2009 | Jun. | Children in Minamata send Tanabata decorations to Devonport |
| 2010 | Nov. | A four member group from Devonport makes an official visit to Minamata |
| 2011 | Nov. | The Mayor of Minamata City and others write messages to Devonport for the "Lantern Dreams Festival" |
| | Dec. | Devonport hosts the "Lantern Dreams Festival"（Dec. 31） 
In front of the message from the Mayor of Minamata |
| 2012 | Sep. | A total of 353 illustrations were sent from elementary and junior high school students in Minamata to be used as placemats for a dinner party at the Sister Cities Australia Annual Conference ・Elementary School Submissions:（Daiichi Elementary: 217、Daini Elementary: 2、Suitou Elementary:10、Kuzuwatari Elementary: 50） ・Junior High School Submissions（Daiichi JHS: 6、Daini JHS: 68) |
| 2013 | Mar. | Four Junior High School Students and three chaperones from Minamata visit Devonport（Mar. 23～30） |
| 2014 | Sep. | Exchange of horse-themed art Elementary school students from each city create artwork and calligraphy based on the theme of horses. The two cities exchange their art and each host exhibitions. ・Minamata contributes 80 works, from four schools ・Devonport contributes 42 works Each city exhibits the art in their respective city halls  
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| 2016 | Feb. | A time capsule, buried in February of 2007, is opened  
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| | Apr. | Commemorating 20 years of Sister City Relations, a delegation from Devonport visits Minamata (8 members, including Mayor Martin)  
At Eco Park Experiencing a tea ceremony |
| 2017 | Mar. | A delegation from Minamata visits Devonport (22 members including Mayor Nishida and City Council chairman Fukuda) At the 20th anniversary commemoration ceremony, each Mayor signs a pledge to further promote cultural exchange between the two cities As proof of 20 years of friendship, a plaque is unveiled in front of a cherry tree, planted in 2016 (pictured on the right)  
At the signing of the 20th anniversary commemoration Unveiling the 20th anniversary commemoration plaque |
| 2018 | Apr. | 24 students and 6 teachers from Devonport High School visit Minamata High School  
At Yunoko Island Recreation (hosted by the music and calligraphy clubs)
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2018 - 2019 | | Koinobori Project Children from Minamata and Devonport each construct carp streamers, attach messages, and then exchange them ・Minamata contributes 154 and 141 streamers (2018-2019) ・Devonport contributes 143 streamers (2018) The carp streamers are exhibited during the celebrations for the 70th anniversary of Minamata becoming a city  
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