Bachelor in Engineering, University Tokyo, 1989. Master in Engineering, University Tokyo, 1991. Doctor of Philosophy, Cornell University, Ithaca, New York, 1995.
Research engineer Nippon Koei Company Ltd., Tokyo, 1991—1997. Assistant Nagaoka (Japan) University of Technology, 1997—1998, assistant professor, 1998—2000, University Tsukuba, Japan, 2000—2005, associate professor Japan, since 2005.
Member of Japan Society Hydrology and Water Resources (Publication Promotion award 1998), Japan Society Civil Engineering, American Meteorological Society, American Geophysical Union.
Married Kumiko Takata, June 4, 1963. Children: Mayu, Koushi.