Dr. Susumu Yasuda is professor of civil and environmental engineering at Tokyo Denki University. He was born in Hiroshima in 1948. He received his B.S. in civil engineering from Kyushu Institute of Technology, and his Dr. of Engineering in civil engineering from University of Tokyo in 1975. Following his Dr. of Engineering, he worked at Kiso-jiban Consultants Co. as a geotechnical consulting engineer. He joined Kyushu Institute of Technology in 1986, and then moved to Tokyo Denki University in 1994. His main research interest is in soil liquefaction during earthquakes. He visited many countries to investigate the damage due to liquefaction. He was board members of Japanese Geotechnical Society and Japan Association for Earthquake Engineering. He is now the Vice President of the Japanese Geotechnical Society and Japan Association for Earthquake Engineering, and the chairman of the Asian Technical Committee on Geotechnology for Natural Hazards in International Society for Soil Mechanics and Geotechnical Engineering.