• Prof. B. Cockburn, April of 1999
  • Prof. A. D. D. Craik of St. Andrews Univ., February, 1998 to January, 1999
  • Prof. Z.-h. Teng and H.-d. Han, September, 1998
  • Prof. L.-a. Ying, October, 1995 -- March 1996
  • Prof. A. Chorin of U. C. Berkeley, June, 1994 his photos in Kyoto
  • Prof. R. Krasny of University of Michigan, October, 1992
  • People who participated in the international workshop "Unstable and Turbulent Motion of Fluid", which I organized together with S. Kida and T. Nishida
  • Prof. S. Tavener of Pennsylvania State University, January, 1993. His photo in Japan
  • Prof. M. Luskin of University of Minnesota, November, 1991. His photos in Japan