KUROSAKI, Masahiro

Masahiro KUROSAKI is Professor of International Law at the Tohoku University School of Law, Japan (since April 2026). He also serves as Chair of the Study Group on International Law organized by the Operational Policy Division of the Bureau of Defense Policy, Ministry of Defense of Japan. He has, on occasion, represented the Government of Japan in diplomatic negotiations on international human rights and humanitarian law as a legal adviser, provided expert testimony before a committee of the National Diet of Japan, and participated in various councils and expert groups convened by the government. He has also held visiting fellowships at Leiden Law School's Grotius Centre for International Legal Studies and the United States Naval War College's Stockton Center for International Law. 

After joining the International Relations Faculty of the National Defense Academy (NDA) of Japan in 2008, he held positions as Lecturer (2008–2011), Associate Professor (2011–2022), and Professor (2022–2026). He has published numerous articles and book chapters on the law of international security, the law of armed conflict, international criminal law, and Japanese security laws, which include: “Towards the Special Computer Law of Targeting: ‘Fully Autonomous’ Weapons Systems and the Proportionality Test,” in Claus Kreß and Robert Lawless (eds.), Necessity and Proportionality in International Peace and Security Law (Oxford University Press, 2020); Strengthening the U.S.-Japan Alliance: Pathways for Bridging Law and Policy (Columbia Law School, 2020)(co-edited with Nobuhisa Ishizuka and Matthew C. Waxman); “The Fight against Impunity for Core International Crimes: Reflections on the Contribution of Networked Experts to a Regime of Aggravated State Responsibility,” in Holly Cullen, Joanna Harrington, and Catherine Renshaw (eds.), Experts, Networks and International Law (Cambridge University Press, 2017). He holds a PhD from the University of Tokyo.