Captain Keitaro Ushirogata is Senior Research Fellow, Japan Maritime Self Defense Force (JMSDF) Command and Staff College. His major publications include: Kaiyo-Senryakuron, in Japanese (Comparative Analysis of Maritime Military Strategies -Area Denial, Sea Control, and Power Projection) (2019), and Owusu to Asia ni okeru kaku no shikiichi, in Japanese ("The Difference of Nuclear Threshold between Europe and Asia-Gedanken Experiment as to Non-Strategic Nuclear Weapons") (Co-authored, 2023). He obtained his bachelor’s degree in social studies from National Defense Academy and earned M.A. in Policy Studies (2014) and Ph.D. in International Relations (2017) from National Graduate Institute for Policy Studies (GRIPS) in Japan. In JMSDF, he served as Operations Staff at Head Quarter Training Squadron, Navigation Officer of JS Mineyuki, Navigation Officer of JS Atago, Operations Staff at Headquarter Escort Fleet Force, Researcher at JMSDF Command and Staff College, Deputy Counsellor at National Ocean Policy Secretariat, Cabinet Office, Government of Japan and Senior Research Fellow at Joint Staff College.