Kiyonobu Kasama is a Professor of Geotechnical, Geoenviromental Engineering and Disaster Prevention at Kyushu University. He obtained his Dr. Eng from Kyushu University, where he has been teaching and conducting research for more than 20 years. He received the Outstanding Paper Awards for Young Researchers from the Japanese Geotechnical Society and The Society of Material Science, Japan. Yoshihisa Sugimura is a Professor at the Graduate School of Maritime Sciences, Kobe University. After receiving his MSc from The University of Tokyo, he joined the Ministry of Land, Infrastructure, Transport and Tourism in 1999, a position that included a secondment to the Ministry of the Environment. He received his Ph.D. degree from The University of Tokyo.