| July 1965 | Formation of Sister City Agreement |
| July 1966 | Yokohama-Odesa Friendship Association established |
| November 1967 | Odesa economic delegation lead by the Mayor of Odesa visits Yokohama |
| September 1968 | Mayor of Yokohama, citizen delegation, and girl’s volleyball team visit Odesa and host a Yokohama friendship trade fair |
| September 1969 | Economic delegation lead by the Mayor of Odesa and a girl’s volleyball team visit Yokohama |
| July 1973 | A group of citizens from Yokohama visit Odesa and participate in a trade fair in Kyiv |
| August 1977 | A group of citizens from Yokohama visit Odesa |
| May 1984 | A group of citizens from Odesa visit Yokohama |
| July 1984 | A group of citizens from Yokohama visit Odesa |
| June 1985 | A delegation from the City of Odesa lead by the Mayor visits Yokohama |
| June 1987 | Delegations representing the City of Yokohama and a boy’s soccer team visit Odesa |
| July 1987 | A group of citizens from Yokohama visit Odesa |
| March 1989 | A group of citizens from Odesa visit Yokohama |
| June 1989 | A delegation from the City of Odesa lead by the Mayor, a pantomime troupe, and delegation from an opera and ballet theater visit Yokohama and participate in Yokohama Special Week |
| August 1989 | Odesa Soccer Team visits Yokohama |
| September 1989 | Yokohama City officials visit Odesa to participate in Odesa’s 195th anniversary ceremony |
| August 1990 | The Odesa Opera and Ballet performs in Yokohama, and a delegation of officials and citizens, junior soccer team, and junior high school students visit Odesa for the 25th anniversary of sister city relations |
| September 1990 | September 1990A Yokohama and Japan film festival and Yokohama art exhibition are held in Odesa |
| October 1990 | A group of citizens from Odesa visit Yokohama |
| January 1991 | Odesa Marathon Team participates in the Yokohama Marathon |
| August 1991 | National Odesa Puppet Theatre performs in Yokohama |
| October 1991 | Yokohama health and medical exchange group dispatched (start of medical exchange) |
| April 1992 | Yokohama Marathon team participates in the Odesa Road Race |
| June 1992 | Puppet theater troupe from the Yokohama Doll Museum performs in Odesa, Yokohama co-sponsors Japanese speech contest organized by the Odesa Japan Club |
| August 1994 | A delegation of Yokohama City officials participate in Odesa’s 200th anniversary ceremony |
| August 1995 | A delegation of Yokohama City officials and citizens visit Odesa for the 30th anniversary of sister city relations |
| September 1995 | A delegation from Odesa visits Yokohama for the 30th anniversary of sister city relations |
| October 1996 | A group from junior high schools in Odesa visits Yokohama and participates in the “Yokokohama Children’s Peace Conference” |
| August 2000 | A group of citizens from Yokohama visit Odesa for the 35th anniversary of sister city relations |
| September 2000 | Yokohama accepts a group for overseas technical trainees |
| January 2004 | the Yokohama-Odesa Friendship Association receives the “Golden Fortune” Award |
| July 2005 | the Mayor of Odesa visits Yokohama, students from Odesa National University visit Yokohama |
| October 2005 | A group of citizens from Yokohama visit Odesa for the 40th anniversary of sister city relations |
| October 2010 | The Deputy Director of the Odesa International Affairs Bureau visits Yokohama for the 45th anniversary of sister city relations and participates in the Yokohama International Festival |
| 2011 | Odesa residents and the Odesa School No. 60 donate funds to areas affected by the Tohoku Earthquake through Yokohama |
| May 2015 | the Chairman of Odesa City Council visits Yokohama and participates in the forum for the 50th anniversary of sister city relations |
| September 2015 | The Director General of the International Affairs Bureau visits Odesa, tree-planting ceremony for the 50th anniversary of sister city relations |
| October-December 2020 | Online photo exhibition for the 55th anniversary of sister city relations |
