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Last Updated :2026/01/26

Kazuki Hagiwara

Department of Jurisprudence/Department of Business Law
Associate professor

Researcher information

■ Degree
  • 博士(国際経済法学), 横浜国立大学
  • Master of Laws (LL.M.), University of Ottawa
  • 修士(国際経済法学), 横浜国立大学
  • 学士(法学), 専修大学
■ Field Of Study
  • Humanities & social sciences, International law

Research activity information

■ Paper
  • Enhanced De Facto Constraints Imposed by Non-legally Binding Instruments and Interactions with Normative Environment: An Analysis of the Joint Statements for the Conservation and Management of Japanese Eel Stock
    Kazuki Hagiwara
    Asian Journal of International Law (First View), Oct. 2023, :1 - 31, Refereed
  • 約法条約第31条3項 (c) の射程と限界 : 持続可能な開発と体系的統合
    Kazuki Hagiwara
    Fukuoka University Review of Law, Sep. 2021, 66(2):431 - 482
  • Suspension of the Intermediate-Range Nuclear Forces Treaty prior to its withdrawal: the content of custom
    Kazuki Hagiwara
    Cambridge International Law Journal, 22 Jun. 2021, 10(1):143 - 164, Refereed
  • 条約法に関するウィーン条約第60条に関する一考察(3)一歴史的変容、多数国間条約へ適用および5項の意義―
    萩原 一樹
    横浜法学, 01 Mar. 2016, 24(2、3合併):85 - 109, Refereed
  • Country Report: Japan
    Kazuki Hagiwara
    IUCN Academy of Environmental Law EJournal, 15 Jun. 2015
  • 条約法に関するウィーン条約第60条に関する一考察(2)一歴史的変容、多数国間条約へ適用および5項の意義―
    萩原 一樹
    横浜法学, 01 Mar. 2015, 23(3):147 - 172, Refereed
  • 条約法に関するウィーン条約第60条に関する一考察(1)一歴史的変容、多数国間条約へ適用および5項の意義―
    萩原 一樹
    横浜法学, 01 Sep. 2014, 23(1):105 - 130, Refereed
  • The Principle of Integration in Sustainable Development Through the Process of Treaty Interpretation: Addressing the Balance Between Consensual Constraints and Incorporation of Normative Environment (LL.M. Thesis) (2013) University of Ottawa
    Kazuki Hagiwara
    2013
  • 条約法条約第60条における重大な違反原則の法典化と多数国間条約への適用
    萩原一樹
    横浜国際社会科学研究, 01 Sep. 2004, 9(3):325 - 344, Refereed
■ Books and other publications
  • The Future of Environmental Law Ambition and Reality, Stefan E. Weishaar & Kars J. de Graaf (eds.)
    Kazuki Hagiwara, Contributor, Chapter 3: An insufficient tool for sustainable development: limitations of systemic integration under Article 31(3)(c) of the Vienna Convention on the Law of Treaties
    Edward Elgar Publishing, Jul. 2023
    9781035314638
  • International Judicial Practice on the Environment: Questions of Legitimacy, Christina Voigt (ed.)
    Kazuki Hagiwara, Contributor, Chapter 6: Sustainable Development before International Courts and Tribunals: Duty to Cooperate and States’ Good Faith
    Cambridge University Press, Apr. 2019
    9781108684385
■ Lectures, oral presentations, etc.
  • Towards Complementing the Legal Environment Through Non-Legally Binding Instruments for Promoting the Conservation and Sustainable Use of Fishery Resources: From the Perspectives of Japan’s Experience
    Kazuki Hagiwara
    The 22nd IUCN Academy of Environmental Law Colloquium, 02 Jul. 2025
  • Interaction Between Non-Legally Binding Instruments Imposing De Facto Constraints and Their Normative Environment for Conservation and Management of Shared Natural Resources
    Kazuki Hagiwara
    2022 IUCN Academy of Environmental Law Colloquium, 14 Jul. 2022
  • Enhanced De Facto Constraints Imposed by Non-legally Binding Instruments and Interactions with Normative Environment: An Analysis of the Joint Statement for Conservation and Management of Japanese Eel Stock
    Kazuki Hagiwara
    The 13th Annual Conference of the Japan Chapter of the Asian Society of International Law, 09 Jul. 2022
  • How to Achieve Sustainable Development Through Article 31(3)(c) of the Vienna Convention on the Law of Treaties: On the Scope and Limitations of the Systemic Integration
    Kazuki Hagiwara
    IUCNAEL 2021 Colloquium - The future of Environmental Law: Ambition and Reality, 01 Jul. 2021, IUCN Academy of Environmental Law, University of Groningen
  • Are Shared Resources a State Good or a Global Public Good?: Reviewing State's Good Faith
    Kazuki Hagiwara
    16th IUCN Academy of Environmental Law Annual Colloquium (University of Strathclyde, Glasgow, UK), 05 Jul. 2018
  • Structure of Duty to Cooperate for Sustainable Use of Marine Living Resources
    Kazuki Hagiwara
    15th IUCN Academy of Environmental Law Annual Colloquium (Cebu, Philippines), 02 Jun. 2017
  • Good Faith and Sustainable Development in International Law
    Kazuki Hagiwara
    14th IUCN Academy of Environmental Law Annual Colloquium (University of Oslo, Norway), 20 Jun. 2016, IUCN Academy of Environmental Law
■ Affiliated academic society
  • American Society of International Law
  • The Japanese Association of World Law
  • 九州国際法学会
  • 国際法学会
■ Research Themes
  • 国際経済協定に基づく貿易と投資の紛争解決基準と国家の公共政策空間の横断的研究
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B)
    Seijo University
    01 Apr. 2017 - 31 Mar. 2022