Professor Masaji Watanabe(Emeritus Professor, Specially Appointed Professor, Okayama University) is active in research areas of applied mathematics, and his recent research topics include studies on underwater topography. His recent academic activities include joint studies on measurement and computational analysis of underwater topography with Mr. Satoshi Iwakami, Mr. Masahiko Tamega, Mr. Masahide Sanada, Mr. Michiaki Mohri, Mr. Yoshitaka Iwakami, Mr. Naoki Okamoto, Mr. Eishi Mitsui(Earth Rise Company, Inc., Okayama, Japan), Dr Shuji Jimbo(Visiting Researcher, Graduate School of Natural Science and Technology, Okayama University, Okayama, Japan). Professor Hidetaka Chikamori, and Associate Professor Ryosuke Akoh(Faculty of Environmental, Life, Natural Science and Technology, Okayama University). He specializes in development and application of mathematical techniquessuch as mathematical modeling, inverse analysis, and numerical simulation.