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A Study of the Exclusive Defense Doctrine in Article 9 of the Japanese Constitution: New Security Policy beyond the Right of Self-Defense

Research Project

Project/Area Number 18H00794
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 05020:Public law-related
Research InstitutionNagoya University

Principal Investigator

YAMAGATA Hideo  名古屋大学, 国際開発研究科, 教授 (80222363)

Co-Investigator(Kenkyū-buntansha) 桐山 孝信  大阪市立大学, 大学院法学研究科, 教授 (30214919)
奥野 恒久  龍谷大学, 政策学部, 教授 (40374756)
西川 由紀子  名古屋大学, 国際開発研究科, 教授 (70584936)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords日本国憲法第9条 / 集団的自衛権 / 個別的自衛権 / 専守防衛 / 武力行使 / 国連憲章 / 自衛権 / 自衛隊 / 武力行使禁止原則 / 日本国憲法 / 国際法 / 平和 / 警察力 / 日本国憲法第9条 / 憲法第9条 / 武力行使禁止 / 安全保障
Outline of Final Research Achievements

In Japan, the Defense Related Law lifting the ban on collective self-defense was enacted in 2015. There was a big debate over the right of self-defense among constitutional law and political science scholars. In international law, use of force is prohibited against another State in international relations in Article 2 (4) of the UN Charter and the right of self-defense is a circumstance to preclude illegality of use of force. Under the national policy of “defensive action only” not to deploy the Self-Defense Forces overseas, military action for national defense within the Japanese territory is not illegal because use force against other countries is not involved. Therefore, exclusive defense policy does not require the right of self-defense in international law. The right of self-defense allowing the use of force against another country contradicts the idea of exclusive defense policy of Japan. It is necessary to consider defense policies without employing the right to self-defense.

Academic Significance and Societal Importance of the Research Achievements

我が国は自衛権を保持し、それに基づき専守防衛のための実力部隊として自衛隊を創設したと説明されてきた。また、集団的自衛権をめぐっても自衛権がなければ国防が不可能であるとの前提で議論されてきた。しかし本研究において、専守防衛を厳守する限りは、国際法上の自衛権を根拠とする必然性はないことを明らかにした。従来の憲法第9条の解釈論にはなかった新しい視点を吹き込むことに成功した。こうした発見は、憲法学に対して貢献を行っただけにとどまるものでない。国内における武力行使という問題点は国際法でも十分議論されておらず、国際法分野においても意義深いものである。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (23 results)

All 2020 2019 2018

All Journal Article (14 results) (of which Open Access: 5 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results) Book (6 results)

  • [Journal Article] 国際法から読み解くソレイマニ氏殺害事件と自衛隊中東派遣2020

    • Author(s)
      山形英郎
    • Journal Title

      法と民主主義

      Volume: 548

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 1990年代以降の憲法学における平和主義論2020

    • Author(s)
      奥野恒久
    • Journal Title

      龍谷大学政策学論集

      Volume: 10巻1号 Pages: 1-14

    • NAID

      120007026036

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 自衛隊による『国際貢献』と憲法2020

    • Author(s)
      奥野恒久
    • Journal Title

      憲法理論叢書

      Volume: 28 Pages: 211-226

    • Related Report
      2020 Annual Research Report
  • [Journal Article] The reality of protecting the Rohingya: an inherent limitation of the Responsibility to Protect2020

    • Author(s)
      NISHIKAWA Yukiko
    • Journal Title

      Asian Securit

      Volume: 16巻1号 Pages: 90-106

    • Related Report
      2019 Annual Research Report
  • [Journal Article] 南シナ海事件と日本:沖ノ鳥島の法的地位2019

    • Author(s)
      山形英郎
    • Journal Title

      静岡大学法政研究

      Volume: 23巻3・4号 Pages: 1-26

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Open Access
  • [Journal Article] 国連平和維持活動の「ゆらぎ」と日本の国際平和協力の課題2019

    • Author(s)
      桐山孝信
    • Journal Title

      法学雑誌

      Volume: 65巻3/4号 Pages: 21-35

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] Governance and Economic Development in Post-Conflict Countries: What Do 30 Post-Conflict Countries Inform Us?2019

    • Author(s)
      NISHIKAWA Yukiko
    • Journal Title

      GSID Discussion paper

      Volume: 210 Pages: 1-19

    • NAID

      120006627996

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] 国民投票と熟議民主主義2019

    • Author(s)
      奥野恒久
    • Journal Title

      日本の科学者

      Volume: 54巻6号 Pages: 13-18

    • Related Report
      2019 Annual Research Report
  • [Journal Article] 恒藤恭『憲法問題』と現在2019

    • Author(s)
      奥野恒久
    • Journal Title

      大阪市立大学史紀要

      Volume: 12号 Pages: 50-65

    • NAID

      120006779288

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] Multilateral Management of the South China Sea Dispute2018

    • Author(s)
      YAMAGATA Hideo
    • Journal Title

      International Review of Contemporary Law

      Volume: November 2018 Pages: 78-90

    • Related Report
      2018 Annual Research Report
    • Open Access
  • [Journal Article] 戦後世界と恒藤恭の社会科学研究2018

    • Author(s)
      桐山孝信
    • Journal Title

      法学雑誌

      Volume: 64巻1・2号 Pages: 38-62

    • Related Report
      2018 Annual Research Report
  • [Journal Article] The reality of protecting the Rohingya: an inherent limitation of the Responsibility to Protect2018

    • Author(s)
      NISHIKAWA Yukiko
    • Journal Title

      Asian Security

      Volume: 15 Pages: 1-17

    • Related Report
      2018 Annual Research Report
  • [Journal Article] 2017年衆議院選挙と「安倍改憲」2018

    • Author(s)
      奥野恒久
    • Journal Title

      法の科学

      Volume: 49 Pages: 190-198

    • NAID

      40021686247

    • Related Report
      2018 Annual Research Report
  • [Journal Article] 「戦後日本憲法学批判」と向き合う2018

    • Author(s)
      奥野恒久
    • Journal Title

      龍谷大学政策学論集

      Volume: 8巻1・2号 Pages: 47-59

    • NAID

      120007154135

    • Related Report
      2018 Annual Research Report
  • [Presentation] 平成日本の国際法政策2020

    • Author(s)
      山形英郎
    • Organizer
      民主主義科学者協会法律部会学術総会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 自衛隊による「国際貢献」と憲法2020

    • Author(s)
      奥野恒久
    • Organizer
      民主主義科学者協会法律部会憲法分科会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Japanese Role for ASEAN's Development2018

    • Author(s)
      NISHIKAWA Yukiko
    • Organizer
      Symposium of Asian Developnent Studies
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Book] 現代国際法の潮流22020

    • Author(s)
      浅田 正彦、桐山 孝信、德川 信治、西村 智朗、樋口 一彦
    • Total Pages
      536
    • Publisher
      東信堂
    • ISBN
      9784798916620
    • Related Report
      2020 Annual Research Report
  • [Book] 入門 憲法学―憲法原理から日本 社会を考える2020

    • Author(s)
      木藤伸一朗・倉田原志・奥野恒久
    • Total Pages
      198
    • Publisher
      法律文化社
    • ISBN
      9784589040817
    • Related Report
      2020 Annual Research Report
  • [Book] フォーカス憲法―事例から学ぶ憲法基盤2020

    • Author(s)
      加藤一彦・阪口正二郎・只野雅人・奥野恒久
    • Total Pages
      352
    • Publisher
      北樹出版
    • ISBN
      9784779306457
    • Related Report
      2020 Annual Research Report
  • [Book] 実証の国際法学の継承2019

    • Author(s)
      芹田健太郎、坂本茂樹、薬師寺公夫、浅田正彦、酒井啓亘、桐山隆信、山形英郎
    • Total Pages
      1033
    • Publisher
      信山社
    • ISBN
      9784797280807
    • Related Report
      2019 Annual Research Report
  • [Book] Political Sociology of Japanese Pacifism2018

    • Author(s)
      NISHIKAWA Yukiko
    • Total Pages
      210
    • Publisher
      Routledge
    • ISBN
      9781138058712
    • Related Report
      2018 Annual Research Report
  • [Book] 9条改正論でいま考えておくべきこと2018

    • Author(s)
      桐山孝信
    • Total Pages
      146
    • Publisher
      日本評論社
    • ISBN
      9784535403512
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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