| No. | Title | Year | Country |
|---|---|---|---|
| 1st | International Symposium on Functional Dyes | 1989 | Osaka, Japan |
| 2nd | 1992 | Kobe. Japan | |
| 3rd | 1995 | Santa Cruz, USA | |
| 4th | 1999 | Osaka, Japan | |
| 5th | International Symposium on Functional π-Electron Systems | 2002 | Ulm, Germany |
| 6th | 2004 | Ithaca, USA | |
| 7th | 2006 | Osaka, Japan | |
| 8th | 2008 | Graz, Austria | |
| 9th | 2010 | Atlanta, USA | |
| 10th | 2011 | Beijing, China | |
| 11th | 2013 | Arcachon, France | |
| 12th | 2015 | Seattle, USA | |
| 13th | 2017 | Hong Kong, China | |
| 14th | 2019 | Berlin, Germany | |
| 15th | 2023 | Raleigh, USA | |
| 16th | 2025 | Jeju, Korea |