| 1st | Cambridge, USA | Brownell and Fairchild | 1983 12-14 October |
|---|---|---|---|
| 2nd | Tokyo, Japan | Hiroshi Hatanaka | 1985 18-20 October |
| 3rd | Bremen, Germany | Detlef Gabel | 1988 31 May-3 June |
| 4th | Sydney, Australia | Barry J. Allen | 1990 4-7 December |
| 5th | Columbus, USA | Albert J. Soloway | 1992 14-17 September |
| 6th | Kobe, Japan | Yutaka Mishima | 1994 31 October- 4 November |
| 7th | Zurich, Switzerland | Borje Larsson | 1996 4-7 September |
| 8th | La Jolla, USA | Frederick Hawthorne | 1998 13-18 September |
| 9th | Osaka, Japan | Keiji Kanda | 2000 2-6 October |
| 10th | Essen, Germany | Wolfgang Sauerwein | 2002 8-13 September |
| 11th | Boston, USA | Robert Zamenhof | 2004 11-15 October |
| 12th | Takamatsu, Japan | Yoshinobu Nakagawa | 2006 9-13 October |
| 13th | Florence, Italy | Aris Zonta | 2008 2-7 November |
| 14th | Buenos Aires, Argentina | Sara J. Liberman | 2010 25-29 October |
| 15th | Tsukuba, Japan | Akira Matsumura | 2012 10-14 September |
| 16th | Helsinki, Finland | Leena Kankaanranta | 2014 14-19 June |
