Updated on 2025/07/29

写真a

 
HIRAI, Mitsuki
 
Affiliation
Faculty of Law, School of Law
Job title
Assistant Professor(non-tenure-track)
Degree
博士（法学） ( 東京大学 )

Research Experience

  • 2022.04
    -
    Now

    Waseda University   Faculty of Law

  • 2019.04
    -
    2022.03

    RIKKYO UNIVERSITY   College of Law and Politics Department of Law   Assistant Professor

  • 2016.04
    -
    2019.04

    明治学院大学法学部特別TA

Education Background

  • 2010.04
    -
    2022.03

    The University of Tokyo   Graduate Schools for Law and Politics  

  • 2004.04
    -
    2010.03

    東京大学   文科一類～法学部（私法コース）  

Professional Memberships

  • 　
    　
    　

    日本法哲学会

Research Areas

  • Legal theory and history

Awards

  • 博士論文特別優秀賞

    2022.02   東京大学大学院法学政治学研究科  

  • 2021年度 日本法哲学会奨励賞 (2020年期) 論文部門

    2021.11   日本法哲学会  

 

Papers

  • 「法とは何か」とは何か：メタ法概念論と概念工学

    平井光貴

    立教法学   ( 104 ) 63 - 159  2021.03  [Refereed]

  • 法理論に関する当為および「法理論の道徳的正当化要求テーゼ」は可能か

    平井光貴

    立教法学   ( 101 ) 267 - 320  2020.03  [Refereed]

  • Legal Positivism and the Point of Theoretical Value-Neutrality

    Hirai Mitsuki

    Archiv für Rechts- und Sozialphilosophie Beiheft 161     177 - 187  2020  [Refereed]

  • 法実証主義と恣意的私的判断の排除

    平井光貴

    法哲学年報     172 - 186  2018.11  [Refereed]

  • 法は一応の道徳性を有するか―Ronald Dworkinの「一応の道徳的正当化テーゼ」と法概念規定の批判的検討

    平井光貴

    法と哲学   2   59 - 85  2016.05  [Refereed]

  • 意味変更による規範理論の可能性

    平井光貴

    法哲学年報     257 - 269  2014.10  [Refereed]

  • 現代自然法論の擁護可能性

    平井光貴

    国家学会雑誌   126 ( 1・2 ) 112 - 182  2013.02

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Books and Other Publications

  • もっと問いかける法哲学

    瀧川裕英( Part： Joint author, 「04 人間の遺伝子を操作してよいか？」pp.50-66)

    法律文化社  2024.05 ISBN: 9784589043405

  • 法哲学の哲学: 法を解明する (基礎法学翻訳叢書 4巻)

    森村進, 郭舜, 伊藤克彦, 平井 光貴( Part： Joint translator, 第7-8章、訳者解説(第1-3節))

    勁草書房  2024.02 ISBN: 4326451394

    ASIN

  • 逞しきリベラリストとその批判者たち：井上達夫の法哲学

    瀧川裕英, 大屋雄裕, 谷口功一( Part： Joint editor, 「法の本質」pp.223-232)

    ナカニシヤ出版  2015.07 ISBN: 9784779509780

Presentations

  • 支配からの自由と移民の処遇

    東京法哲学研究会 

    Presentation date： 2025.07

  • New Problems in An Advanced-Technology Era and its educational implication

    Hirai, Mistuki  [Invited]

    the Second World Jurist Forum 

    Presentation date： 2024.05

    Event date：
    2024.05
    　
    　

  • 郭舜『国際法哲学の復権』（弘文堂、2022）合評会

    宇佐美誠、松元雅和、平井光貴、郭舜

    東京法哲学研究会 

    Presentation date： 2024.03

  • AI, Free Will, and Responsibility Attribution

    Hirai Mitsuki

    Presentation date： 2023.10

  • AI, Responsibility and VR’s Potential Influence on AI’s Agency

    Mitsuki Hirai

    Law and Technology Consortium 

    Presentation date： 2023.05

    Event date：
    2023.05
    　
    　

  • 法の支配の趣旨や要素について

    平井光貴

    法理論研究会定例研究会 

    Presentation date： 2022.04

  • メタ法理論、概念工学と法の支配

    日本法哲学会・学術大会 

    Presentation date： 2021.11

  • Immigrants, Agency and the Rule of Law

    Mitsuki Hirai

    IVR World Congress 2019 

    Presentation date： 2019.07

  • Legal Positivism and Substantive/Methodological Value-Neutrality

    平井光貴

    2018 IVR Japan International Conference 

    Presentation date： 2018.07

  • Hart-Dworkin論争の対立点：理論動機からの検討

    平井光貴

    東京法哲学研究会 

    Presentation date： 2018.05

  • 法の反本質主義と法概念論の目的

    平井光貴

    東京法哲学研究会 

    Presentation date： 2016.07

  • 法の規範性と法理学方法論

    平井光貴

    東京法哲学研究会 

    Presentation date： 2015.03

  • 現代自然法論の擁護可能性

    平井光貴

    日本法哲学会・学術大会 

    Presentation date： 2013.11

  • 現代自然法論の擁護可能性と二種類の規範理論

    平井光貴

    東京法哲学研究会 

    Presentation date： 2013.10

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Research Projects

  • 法という統治形式に関するメタ理論的・記述的・規範的研究

    日本学術振興会  科学研究費助成事業

    Project Year :

    2019.08
    -
    2021.03
     

  • Construction of a philosophical foundation of Global Legisprudence by unifying legisprudence and theories of global justice

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research

    Project Year :

    2015.04
    -
    2018.03
     

    INOUE Tatsuo, TAJIMA Masaki, KATSURAGI Takao, ISHIYAMA Fumihiko, OE Hiroshi, INADA Yasuaki, HASHIMOTO Tsutomu, OKUDA Junichiro, TAKIKAWA Hirohide, YOKOHAMA Tatsuya, MATSUMOTO Mitsuo, TANIGUSHI Koichi, FUJIOKA Daisuke, OHYA Takehiro, INOUE Akira, IKEDA Hirono, KAKU Shun, YOSHINAGA Kei, KIRA Takayuki, URAYAMA Seiko, ANDO Kaoru, YONEMURA Kotaro, MORI Yuichiro, HIRAI Mitsuki, MATSUDA Kazuki

    　View Summary

    The purpose of our research is to construct a new philosophical foundation of ‘global legisprudence’ by developing and integrating the theoretical resources of legisprudence and global justice. We revealed that the conventional theories of legisprudence which almost exclusively focused on domestic legislation could not appropriately deal with the problems that domestic legislation and global order formation interacted with each other. Then we presented some guides for division of labor between domestic legislation and global law-making, and explored how to guarantee democratic accountability of both. Thereby we built a philosophical foundation of global legisprudence.

  • Legisprudential Foundation Building for the Legislative System Reform

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research

    Project Year :

    2012.04
    -
    2015.03
     

    INOUE TATSUO, TAJIMA Masaki, KATSURAGI Takao, ISHIYAMA Fumihiko, OE Hiroshi, INADA Yasuaki, HASHIMOTO Tsutomu, OKUDA Junichiro, TAKIKAWA Hirohide, YOKOHAMA Tatsuya, MATSUMOTO Mitsuo, TANIGUSHI Koichi, FUJIOKA Daisuke, OHYA Takehiro, INOUE Akira, KONOE Sara, KAKU Shun, YOSHINAGA Kei, ANDO Kaoru, YONEMURA Kotaro, IKEDA Hirono, KIRA Takayuki, URAYAMA Seiko, HIRAI Mitsuki

    　View Summary

    Our research developed, both thematically and methodologically, the project of the new theoretical movement of ‘legisprudence’, which has come to the fore in the world of international legal philosophy in the past few years. We investigated deeply into the new urgent problems of our legislative system, which is now undergoing a profound change owing to the structural transformations of the Japanese political practice. We showed that the conventional legislation-studies focused on the routine process and techniques of bill-formation and the specific legislative policies cannot meet the challenges posed by these problems of structural change. Two advocate a more promising alternative, we developed the theoretical resources of ‘legisprudence’ and presented some philosophical guides for a normative conception of the comprehensive legislative system design, thereby building the ‘legisprudential’ foundation of the legislative system reform.

  • 司法過程以外の法実践における規範的な統制可能性の検討

    科学研究費助成事業

    Project Year :

    2013.07
    -
    2015.01
     

Misc

  • 学会展望：Frank Lovett, A Republic of Law (Cambridge University Press, 2016, 233+x pp.)

    平井光貴

    国家学会雑誌   135 ( 11・12 ) 970 - 973  2022.12

  • 学会展望：Stefano Bertea, The Normative Claim of Law (Hart Publishing, 2009, 307pp.

    平井光貴

    国家学会雑誌   129 ( 5・6 ) 209 - 211  2016.06

  • 学会展望：Andrei Marmor, Social Conventions: From Language to Law (Princeton University Press, 2009, xii + 186pp.)

    平井光貴

    国家学会雑誌   125 ( 9・10 ) 127 - 130  2012.10

 

Syllabus

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Academic Activities

  • 東京法哲学研究会2024年度幹事

Sub-affiliation

  • Faculty of Law   Graduate School of Law