Hiroyuki BANZAI

• Position: Professor (Faculty of Law, Waseda University)
• Degree: MA in Law, Waseda University; Ph.D., Waseda University
• Background:
  Associate Professor of Law, Waseda University (2009 – 2011)

Field of Specialization / Research Theme / Research Projects

Sources of Law / International Responsibility of States / Disarmament and Non-Proliferation of WMD

[Research Grants]

International Enforcement for Domestic Implementation of International Legal Norms of Common Interests, Japan Society for the Promotion of Science (Grants-in-Aid for Scientific Research) 2017 – 2020

Major Works/ Publications

[Books]

• Hiroyuki Banzai, Law on State Responsibility, in International Law (Asada Masahiko, ed., Toshindo, 2025)
• Hiroyuki Banzai (ed.), Law of the Sea (Shinzansha, 2024)
• Hiroyuki Banzai, Nobuyuki Kato and Takuhei Yamada (eds.), International Law (Yuhikaku, 2024)
• Hiroyuki Banzai, Impacts on Jus Cogens: Impact on the Law of State Responsibility and Law of Treaties, in Global Impact of the Ukraine Conflict: Perspectives from International Law (Shuichi Furuya, Hitomi Takemura, Kuniko Ozaki eds., Springer, 2023)
• Hiroyuki Banzai, Diplomatic framework for Japan-Taiwan relations, in Japan-Taiwan Economic Intercourse and International Law (Hiroyuki Banzai ed., Seibundo, 2020)
• Hiroyuki Banzai, Study on the Responsibility for Internationally Wrongful Acts (Seibundo, 2015)

[Articles]

• Hiroyuki Banzai, Reissuing the Settlement of Problems concerning Property and Claims between Japan and Republic of Korea: International Law Perspective, 4 Collection of Essays Commemorating the Centenary of the Waseda University Law Association, 301 (2022)
• Hiroyuki Banzai, International Responsibility of States for Injury Caused by COVID-19, 699 International Affairs 17 (2021)
• Hiroyuki Banzai, Protection of the Company: Barcelona Traction, Light and Power Company, Limited, 255 Jurist 148 (2021)
• Hiroyuki Banzai, Disputes on State Responsibility for the Restoration of a Common Interest in International Law, 117(1) Journal of International Law and Diplomacy 25 (2018)

Academic Societies/ Service to Society

Academic Societies

• Japanese Society of International Law
• Japan Association of International Relations

Service to Society

• Japanese Society of International Law Board Member (2022 – present)
• Ministry of Foreign Affairs Study Group for International Law Member (2003 – present)
• Ministry of Foreign Affairs Wise Persons Group for Japan-EU Relationship Member (2009 – 2010)

Awards

• Adachi Mineichiro Memorial Award (2016)

Web Page / Researcher DB / Course List

Details of a Researcher – BANZAI, Hiroyuki

Message to Prospective Students

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