Koki Arai is Professor of Economics, Faculty of Business, the Kyoritsu Women’s University. His research interests are in the field of industrial organization and competition policy. Before current position, he was Special Researcher for Economics, Japan Fair Trade Commission and Deputy Director, Competition Policy Research Center. Before working for economic study, he was in charge of economic research office as a director, merger and acquisition (M&A) issues in the M&A division of JFTC as senior examiner, and international affairs office in International Competition Network issues as senior policy planner. He received his Ph.D. from Osaka University, and his B.A. from Waseda University.