Basic Information

Faculty

• Faculty of Law

Email Address

• Email Address

  okada.yohei.7ukyoto-u.ac.jp

Professional Memberships

• International Law Association Japan Branch
• THE JAPANESE ASSOCIATION OF WORLD LAW
• JAPANESE SOCIETY OF INTERNATIONAL LAW

Academic Degree

• 23 Mar. 2015

  京都大学博士(法学)
• 26 Mar. 2012

  京都大学修士(法学)

Academic Resume (Graduate Schools)

• 京都大学, 大学院法学研究科博士後期課程法政理論専攻, 修了
• 京都大学, 大学院法学研究科修士課程法政理論専攻, 修了

Academic Resume (Undergraduate School/Majors)

• 京都大学, 法学部, 卒業

Research History

• From Oct. 2024, To Present

  Kyoto University, Graduate School of Law, Professor
• From Oct. 2015, To Sep. 2024

  Kobe University, 大学院国際協力研究科, 准教授
• From Sep. 2018, To Sep. 2019

  Max Planck Institute for Comparative Public Law and International Law, 客員研究員
• From Apr. 2015, To Sep. 2015

  Kyoto University, 大学院法学研究科, 特定助教
• From Apr. 2012, To Mar. 2015

  Japan Society for the Promotion of Science, 特別研究員（DC1）

ID,URL

• J-Global ID

  201501009153816703

researchmap URL

• https://researchmap.jp/7000011392

Research

Research Interests

• International law
• State responsibility
• State immunity
• International organizations

Research Areas

• Humanities & social sciences, International law

Papers

• When Is the State Estopped from Denying Attribution? Decoding ARSIWA Article 11

  Yohei Okada

  Journal of International Law and Diplomacy, May 2025, Invited, Lead author

  
• The sovereign function test out of thin air? The status of the central bank determined behind the scenes in Certain Iranian Assets

  Kei Nakajima; Yohei Okada; Kento Nisugi

  Journal of International Dispute Settlement, 29 Mar. 2024, Peer-reviewed

  
• Locating the Veto Power in the International Legal Order: When a Permanent Member of the UN Security Council Becomes an Aggressor

  Yohei Okada

  Shuichi Furuya, Hitomi Takemura and Kuniko Ozaki (eds.), Global Impact of the Ukraine Conflict: Perspectives from International Law (Springer, 2023), 01 Dec. 2023, Invited, Lead author

  
• 国際機構からの排除という「制裁」——資格停止、除名、あるいは脱退

  岡田陽平

  有斐閣Onlineロージャーナル, Jul. 2023, Invited, Lead author

  
• Can Acta Jure Gestionis Be Attributable to the State? A Restrictive Doctrine of State Responsibility

  Yohei Okada

  European Journal of International Law, 01 May 2023, Peer-reviewed, Lead author

  
• 外国刑事管轄権から免除される政府職員の公的行為——国際法における「帰属」の遍在性に関する一考察

  岡田陽平

  法学志林, Dec. 2022, Lead author

  
• 公的資格は無関係か——現職国家元首に対する逮捕状発付にみる国際刑事裁判所と国連安全保障理事会の関係

  岡田陽平

  法律時報, Jun. 2021, Invited, Lead author

  
• Deprivation or Circumvention of the UN’s Immunity: How to Cure the UN of Its ‘Autoimmune Disease’ in Peacekeeping

  Yohei Okada

  Journal of International Peacekeeping, 18 Dec. 2020, Peer-reviewed, Lead author

  
• Overcoming the Hurdles to Accountability in UN Peacekeeping: Introduction to the Special Issue

  Yohei Okada; Nigel D. White

  Journal of International Peacekeeping, 18 Dec. 2020, Peer-reviewed, Lead author

  
• 国連平和維持活動における行為の帰属——スレブレニツァをめぐるオランダ国内裁判例の分析

  岡田陽平

  長有紀枝編『スレブレニツァ・ジェノサイド——25年目の教訓と課題』（東信堂、2020年）, Oct. 2020, Invited, Lead author

  
• The Immunity of International Organizations before and after Jam v IFC: Is the Functional Necessity Rationale Still Relevant?

  Yohei Okada

  Questions of International Law, Jul. 2020, Peer-reviewed, Invited, Lead author

  
• 行為帰属法の規範構造——国家責任条文第5条の解釈を中心に——

  岡田陽平

  国際法外交雑誌, May 2020, Peer-reviewed, Invited, Lead author

  
• What’s Wrong with Behrami and Saramati? Revisiting the Dichotomy between UN Peacekeeping and UN-authorized Operations in Terms of Attribution

  OKADA Yohei

  Journal of Conflict & Security Law, Mar. 2019, Peer-reviewed

  
• Effective Control Test at the Interface between the Law of International Responsibility and the Law of International Organizations: Managing Concerns over the Attribution of UN Peacekeepers’ Conduct to Troop-contributing Nations

  OKADA Yohei

  Leiden Journal of International Law, Feb. 2019, Peer-reviewed

  
• Identification of Customary International Law by the International Court of Justice : Some Reflections on Recent Debates

  岡田 陽平; 高田陽奈子; 阿部紀恵

  国際協力論集, Jan. 2019

  
• Interpretation of Article VIII, Section 29 of the Convention on the Privileges and Immunities of the UN

  Yohei Okada

  International Organizations Law Review, 2018, Peer-reviewed, Lead author

  
• The Inherent Conflict between Jurisdictional Immunity of International Organizations and the Right of Access to Courts: An Analysis of the ECtHR Case Law

  OKADA YOHEI

  Journal of International Cooperation Studies, Jan. 2017, Lead author

  
• 国連安保理の授権に基づいて活動する多国籍軍の行為の帰属——国連平和維持軍と多国籍軍の伝統的二分論再考

  OKADA Yohei

  法学論叢, 2015, Lead author

  
• 国連平和維持活動に従事する部隊構成員の行為の帰属——三つの「実効的支配」基準

  OKADA Yohei

  法学論叢, 2014, Lead author

  

Misc.

• 学界回顧2024・国際法

  越智萌; 岡田陽平; 二杉健斗

  法律時報, Dec. 2024, Invited

  
• 学界回顧2023・国際法

  越智萌; 岡田陽平; 二杉健斗

  法律時報, Dec. 2023

  
• [Book Review] Epidemics and International Law, edited by Shinya Murase and Suzanne Zhou. Brill | Nijhoff, 2021, Pp. xxxvi, 708.

  Yohei Okada

  Japanese Yearbook of International Law 2023, Dec. 2023, Invited, Lead author

  
• 未承認国に対する裁判権免除——東京地裁令和4年3月23日判決

  岡田陽平

  令和4年度重要判例解説, Apr. 2023, Invited, Lead author

  
• 学界回顧2022・国際法

  越智萌; 岡田陽平; 二杉健斗

  法律時報, Dec. 2022

  
• 移送受刑者に対して行われた恩赦と生命に対する権利——憎悪犯罪の実行者に対する恩赦等の措置が国家責任条文11条にいう承認・採用を構成するか——マクチヤン判決

  岡田陽平

  人権判例報, Dec. 2022, Peer-reviewed, Invited, Lead author

  
• Stichting Mothers of Srebrenica and others v Netherlands, Admissibility, 11th June 2013 (App no 65542/12)

  Yohei Okada

  Oxford International Organization, Aug. 2022, Peer-reviewed, Invited, Lead author

  
• 帰属(2)——ジェノサイド条約適用事件（ボスニア対セルビア）

  岡田陽平

  国際法判例百選（第3版）, Sep. 2021, Invited, Lead author

  
• Covid-19と国際機構

  岡田陽平

  国際法学会エキスパートコメント No. 2021-4, Mar. 2021, Invited, Lead author

  
• Csaba Kovács, Attribution in International Investment Law (Kluwer Law International Law, 2018, xv+344 pp.)

  Yohei Okada

  日本国際経済法学会年報, Nov. 2020, Invited, Lead author

  

Presentations

• 行為帰属と禁反言法理——国家責任条文11条の解読

  岡田陽平

  国際法学会2023年度（第126年次）研究大会, 06 Sep. 2023

  
• 国家責任条文第5条の適用における主権的行為と業務管理行為の峻別論について ―国家責任法による行為帰属の規律の動態的把握―

  岡田 陽平

  国際法学会2019年度（第122年次）研究大会, 04 Sep. 2019, Invited

  
• The Question of Responsibility in Case of a Failure by UN Peacekeepers to Protect Civilians from Genocide

  OKADA Yohei

  Seminar at the Institute for International Peace and Security Law, 25 Jun. 2019, Invited

  
• Jam et al. v. International Finance Cooperation: Towards Sustainable Rules on Immunities of International Organizations?

  OKADA Yohei

  Seminar at University of Milan, 16 May 2019, Invited

  
• The Responsibility of the UN for Human Rights Violations in Peacekeeping Operations: Recent Case Law and New Questions

  Martina Buscemi; OKADA Yohei

  Human Rights Discussion Group at the Max Planck Institute for Comparative Public law and International Law, 07 Dec. 2018

  

Books and Other Publications

• 概説国際法

  加藤, 信行; 萬歳, 寛之; 山田, 卓平; 伊藤, 一頼; 岡田, 陽平; 瀬田, 真; 竹村, 仁美; 前田, 直子; 川岸, 伸, Contributor, 第５章 国際法上の免除／第11章 国際機構

  有斐閣, Dec. 2024

  Find Kyoto University's collection of books :

  

External funds: Kakenhi

• The Public-Private (Sovereign-Commercial) Dichotomy in International Law

  Grant-in-Aid for Scientific Research (B)

  Basic Section 05030:International law-related

  Kobe University

  岡田 陽平

  From 01 Apr. 2024, To 31 Mar. 2028, Granted

  国際法;主権;公私二分論;商業的取引;中央銀行

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24K00200/
• Remedies for human rights violations caused by UN peacekeeping operations

  Grant-in-Aid for Young Scientists (B)

  Kobe University

  Yohei Okada

  From 01 Apr. 2017, To 31 Mar. 2020, Project Closed

  平和維持活動;国連;行為帰属;ジェノサイド;スレブレニツァ;ルワンダ;責任;アカウンタビリティ;人権侵害;救済;スレブレニッツァ;国際責任;裁判権免除;代替手段提供義務;国連特権免除条約;人権アプローチ;国連平和維持活動

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K13618/
• Constructing the Arctic International Legal Order: Science, Environment, Ocean, and Institution

  Grant-in-Aid for Scientific Research (B)

  Kobe University

  Akiho Shibata

  From 01 Apr. 2016, To 31 Mar. 2021, Project Closed

  国際法;北極;海洋法;国際環境法;先住民族の権利;国際法学;先住民の権利;北極評議会

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16H03551/
• Invocating Responsibility of International Organizations

  Grant-in-Aid for Research Activity Start-up

  Kobe University

  Yohei Okada

  From 28 Aug. 2015, To 31 Mar. 2017, Project Closed

  国際機構;責任;裁判権免除;人権アプローチ;代替手段提供義務;国連特権免除条約;国連憲章第103条;国際責任;責任追及手続;平和維持活動

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H06302/
• Attribution in International Law: Its Ubiquitous Relevance

  Grant-in-Aid for Scientific Research (B)

  Basic Section 05030:International law-related

  Kobe University

  Yohei Okada

  From 01 Apr. 2020, To 31 Mar. 2024, Project Closed

  帰属;国家責任;国家免除;法律行為;代表;国家主権;行為帰属;商業的取引;主権的行為;中央銀行;国際法;遍在性;免除;国家中心主義;非国家主体;国有企業;政府職員免除;投資条約仲裁

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20H01425/

Education

Teaching subject(s)

• From 01 Apr. 2025, To 31 Mar. 2026

  Readings in Humanities and Social Sciences (Law, English)I-E1

  HA06, Spring, Institute for Liberal Arts and Sciences, 2
• From 01 Apr. 2025, To 31 Mar. 2026

  International Law (Individuals, Dispute Settlement and Use of Force)

  1056, Spring, Faculty of Law, 4
• From 01 Apr. 2025, To 31 Mar. 2026

  International Law II

  B281, Year-long, Graduate School of Law, 4
• From 01 Apr. 2025, To 31 Mar. 2026

  International Law II

  A281, Year-long, Graduate School of Law, 4
• From 01 Apr. 2025, To 31 Mar. 2026

  International Law (Individuals, Dispute Settlement and Use of Force)

  8226, Spring, Faculty of Economics, 4
• From 01 Apr. 2025, To 31 Mar. 2026

  Seminar - International Law

  3404, Spring, Faculty of Law, 2
• From 01 Apr. 2025, To 31 Mar. 2026

  Introduction to Law

  1248, Spring, Faculty of Law, 2
• From 01 Apr. 2025, To 31 Mar. 2026

  Research Paper I - International Law II

  R281, Year-long, Graduate School of Law, 2

Participation in PhD Defense

• 国際平和活動に適用される行為帰属論に関する考察

  LINA SHEN, Graduate School of Law, Sub-chief Examiner

  24 Mar. 2025