Akira Matsui is the director of the Matsui Store Co., Ltd. He completed the Graduate School of Life and Environmental Sciences, University of Tsukuba, where he obtained a Ph.D. in agriculture. His specialty is the study of ecological engineering in paddy fields and rivers. He is currently researching a regional natural ecosystem for conservation, carrying out interdisciplinary research that combines ecology and civil engineering and striving to return the results to the world. He is a member of the Ecology and Civil Engineering Society.