Research theme for competitive and other funds (1)：
2017 - 2022 Comprehensive Study on Dispute Resolution Standards over Trade and Investment and Public Policy Space of a State in International Economic Agreements
Papers (9)：
Kazuki Hagiwara. 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. Asian Journal of International Law (First View). 2023. 1-31
Kazuki Hagiwara. The Scope and Limitations of Article 31(3)(c) of the Vienna Convention on the Law of Treaties : Sustainable Development and the Systemic Integration. Fukuoka University Review of Law. 2021. 66. 2. 431-482
Kazuki Hagiwara. Suspension of the Intermediate-Range Nuclear Forces Treaty prior to its withdrawal: the content of custom. Cambridge International Law Journal. 2021. 10. 1. 143-164
The Future of Environmental Law Ambition and Reality, Stefan E. Weishaar & Kars J. de Graaf (eds.)
Edward Elgar Publishing 2023 ISBN:9781035314638
International Judicial Practice on the Environment: Questions of Legitimacy, Christina Voigt (ed.)
Cambridge University Press 2019 ISBN:9781108684385
Lectures and oral presentations (6)：
Interaction Between Non-Legally Binding Instruments Imposing De Facto Constraints and Their Normative Environment for Conservation and Management of Shared Natural Resources
(2022 IUCN Academy of Environmental Law Colloquium 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
(The 13th Annual Conference of the Japan Chapter of the Asian Society of International Law 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
(IUCNAEL 2021 Colloquium - The future of Environmental Law: Ambition and Reality 2021)
Are Shared Resources a State Good or a Global Public Good?: Reviewing State's Good Faith
(16th IUCN Academy of Environmental Law Annual Colloquium (University of Strathclyde, Glasgow, UK) 2018)
Structure of Duty to Cooperate for Sustainable Use of Marine Living Resources
(15th IUCN Academy of Environmental Law Annual Colloquium (Cebu, Philippines) 2017)
