KEYNOTE LECTURES AT NATIONAL AND INTERNATIONAL CONFERENCES

1. Annual Meeting of the Society of Mining Geologists, Tokyo, Japan, 1977.
2. Fourth-International Conference on Water-Rock Interaction, Misasa, Japan, 1983.
3. Conference on Tectonic Control of Ore Deposits, Princeton, 1984.
4. International Conference on Recent Advances in Geochemistry of Ore Deposits, Montreal, Canada, 1984.
5. International Conference on Stable Isotopes and Fluid Processes, Brisbane, Australia, 1985.
6. NATO Advanced Study Institute on Geochemistry of Hydrothermal Ore Deposits,
   Salamanca,Spain, 1987.
7. Symposium on “Future of Mineral Resources and Economic Geology”, Japanese National Academy of Science, Tokyo, Japan, 1988.
8. Annual Meeting of the Society of Petrology, Mineralogy, and Economic Geology, Sendai, Japan, 1988.
9. International Geological Congress, Kyoto, Japan, 1992.
10. Australian Geological Convention, Perth, Australia, 1994.
11. International Conference on Chemistry and Migration Behavior of Actinides and Fission Products in the Geosphere, Sendai, Japan, 1997.
12. Annual Meeting of the Geological Society of Namibia, Windhoek, Namibia, 1998.
    Annual Meeting of the Geological Society of South Africa, 1998.
13. Conference on “Bridging the Two Worlds, Archean and Proterozoic”, UCLA, 1999.
14. 50th Anniversary of the Society of Resource Geology, Tokyo, 2001.
15. Gordon Conference on “Geochemistry of Hydrothermal Ore Deposits”, Plymouth, NH, 2001.
16. Fourth International Archean Symposium, Perth, Australia, 2001.
17. Pardee Symposium, Geological Society of America, Denver, 2002.
18. The Geochemical Society Fermor Lecturer, Cardiff, Wales, 2003.
19. Gast Lecturer, The Goldschmidt Conference, Kurashiki, Japan, 2003.
20. Invited lecture "Evolution of the Atmosphere" at the Novatis Foundation, London, England, 2005.