*Hideyuki KAMIMERA¹, Seishi NABESAKA¹, Fadli SYAMSUDIN², Thanh NGO-DUC³, Xe LE VIET⁴, Hilton T. HERNANDO⁵, Jun MATSUMOTO⁶, Tomoo USHIO⁷, Yoichi IWAMI¹ (1.International Centre for Water Hazard and Risk Management, Japan, 2.Agency for the Assessment and Application of Technology, Indonesia, 3.Vietnam National University at Ha Noi, Vietnam, 4.National Hydro-Meteorological Service, Vietnam, 5.Philippine Atmospheric, Geophysical and Astronomical Services Administration, the Philippines, 6.Tokyo Metropolitan University, Japan, also at Japan Agency for Marine-Earth Science and Technology, 7.Osaka University, Japan)