| July 1981 |
Sister City Promotion Section established |
| 1st September 1981 |
Takasaki International Sister City Exchange Section established |
| 1st June 1985 |
Name changed to Takasaki International Relations Section |
| 30th November 1989 |
Conference for the establishment of the Takasaki International Relations Society |
| 1st April |
Takasaki International Relations Society established |
| 15th May 1996 |
Section ChangesBefore: America, Brazil, China, Czech sectionsAfter:International Foreign Affairs, Project Planning, Youth Development, Public Relations sections |
| 25th May 2008 |
Establishment of the new Communication Support Section |