*Kanchana Kumari Mallika Achchillage¹, Tsuyoshi Wakatsuki², Chiaki Oguchi³ (1.PhD student, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama, 338-8570, Japan, 2.Chief Researcher, Storm, Flood, and Landslide Research Division, National Research Institute for Earth Science and Disaster Resilience, 3-1 Tennodai, Tsukuba, Ibaraki, 305-0006, Japan, 3.Associate Professor, Department of Civil and Environmental Engineering, Saitama University, 255 Shimo-Okubo, Sakura-ku, Saitama, 338-8570, Japan)

*Mone Hamano¹, Thomas Parkner² (1.University of Tsukuba, Graduate School, 2.University of Tsukuba, Faculty of Life and Environmental Sciences)

*Daniel R Newman¹, Yuichi S. Hayakawa¹, Akira Kato², Mio Kasai¹, Kotaro Iizuka³ (1.Hokkaido University, 2.Chiba University, 3.University of Tokyo)

*Shintaro Takanami¹ (1.Meiji University)

*Yoshinori Kodama¹, Aoi Ogawa² (1.Faculty of Agriculture, 2.Graduate student, Faculty of Agriculture, Tottori Univ.)