SAHASHI Ryo is a Professor of International Relations, Institute for Advanced Studies on Asia, the University of Tokyo. He specializes on international politics in East Asia. He received his B.A. from International Christian University and his Ph.D. from the Graduate Schools for Law and Politics at the University of Tokyo. Dr. SAHASHI sits on government panels including Council on the Actual State of Land Use and Advisory Panel on Science & Technology Diplomacy. He also works as Visiting Fellow of 21st Century Policy Institute, Keidanren. He has been visiting scholars with Stanford University, the Wilson Center, and Seoul National University. He sits on the board of Japan Center for International Exchange and National Bureau of Asian Research. His recent books are US-China Rivalry: A Shift of American Strategy and Divided Worlds (Tokyo: Chuko, 2021) and In a Search for Coexistence: the United States and Two Chinas during the Cold War (Tokyo: Keiso, 2015), and he edits East Asian Order in the Post-Cold War Era (Tokyo: Keiso, 2020) and Asia Rising: A Handbook of History and International Relations in East, South and Southeast Asia (Springer, 2024). He has been on the editorial board on Asia Policy, Japan Studies (HUFS), and International Journal of Asian Studies.