Prof. Dr. Hitoshi Soyama completed his PhD at Tohoku University, Japan. He has been working at Tohoku University since 1991, and he was promoted to professor in 2003. He was made a Fellow of the American Society of Mechanical Engineers ASME and an honorary member of the Water Jet Technology Society of Japan. He is known for his work in the field of cavitation and its practical application such as in water treatment and mechanical surface treatment, i.e., cavitation peening. Although cavitation impacts cause severe damage in hydraulic machinery, his research has utilized cavitation impacts to enhance the fatigue properties of metallic materials. In addition, he has been the recipient of Awards for Science and Technology (Development Category); the Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology (2024); the Fluid Science Research Award, the Fluid Science Foundation (2014); the Ichimura Prize in Science for Excellent Achievement; the New Technology Development Foundation (2013); the JSME Medal for Outstanding Paper; the Japan Society of Mechanical Engineers (2007); and so on.