- 2023 - 2028 Functional systems of realization of global norms through activities of specialized agencies
- 2022 - 2026 Theory and practice of international dispute settlement in the era of the League of Nations
- 2022 - 2026 国際連盟期の国際紛争解決に関する思想と実践
- 2021 - 2025 Comparative Study for Theoretical Foundation of Global Relations: the temporal turn and beyond
- 2021 - 2025 History of political ideas concerning 'external threat and fear'
- 2021 - 2024 Japanese Influences on International Law
- 2021 - 2023 Construction of a system of global health law
- 2020 - 2023 人質による合意保証メカニズムの研究
- 2017 - 2021 comparative studies of public Laws with historical contexts in the era of globalization
- 2017 - 2021 Mediacy, Enemy, and Neutrality: Carl Schmitt's theory of international law
- 2014 - 2017 International law doctrines in the inter-war period
- 2012 - 2016 Deconstructing Westphalian Narrative: A Meta-Discipilinary Approach
- 2012 - 2015 Studies of the "Kelsen-Renaissance" in German science of public law
- 1998 - 1999 現代フランス国際法学の史的展開
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