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The Intelligence Factor in Prewar US-Japan Relations : The Role of SIGINT on Decision Making

Research Project

Project/Area Number 20730118
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field International relations
Research InstitutionKobe University

Principal Investigator

MINOHATA Toshihiro (MINOHARA Toshihiro)  神戸大学, 法学研究科, 教授 (40314455)

Project Period (FY) 2008 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsインテリジェンス / 暗号解読 / SIGINT / 政策決定 / 日米関係 / MAGIC / ULTRA / 開戦期 / シグイント / 通信解読 / 通信諜報 / 外務省 / 国務省 / マジック / 参謀本部第18班 / 軍令部特務班
Research Abstract

This research has been able to shed light on how prewar Japanese signals intelligence had impacted the decision-making of the Japanese leaders in Tokyo, particularly of the critical period during the US-Japan conversations just prior to Pearl Harbor. This in turn has allowed for an altogether new evaluation of the path to the Pacific War. In terms of research output, emphasis was placed on international presentations as real time feedback can be obtained. These will be reflected in the forthcoming monograph that is under consideration. Furthermore, this research has led to two articles in edited compilations, one in English and the other in Japanese.

Report

(6 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report   Self-evaluation Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (30 results)

All 2013 2012 2011 2010 2009 Other

All Presentation (20 results) Book (10 results)

  • [Presentation] World War II and War Crimes in the Pacific Region2012

    • Author(s)
      Tosh Minohara
    • Organizer
      Association of Asian Studies
    • Place of Presentation
      トロント
    • Year and Date
      2012-03-16
    • Related Report
      2011 Annual Research Report
  • [Presentation] Jackson School of International Studies "No Choice but to Rise"2012

    • Organizer
      The Intelligence Dimension behind Japan's Decision to Cross the Rubicon in December 1941
    • Place of Presentation
      University of Washington
    • Year and Date
      2012-01-12
    • Related Report
      2011 Final Research Report
  • [Presentation] Asian Studies Conference Japan2012

    • Author(s)
      Toshihiro Minohara
    • Organizer
      Crossing the Rubicon : Foreign Minister Togo Shigenori and Japan's Decision for War
    • Place of Presentation
      RikkyoUniversity
    • Related Report
      2011 Final Research Report
  • [Presentation] Not the Usual Suspects : New Perspectives on Japanese Diplomacy2011

    • Author(s)
      Tosh Minohara
    • Organizer
      Association of Asian Studies
    • Place of Presentation
      ホノルル
    • Year and Date
      2011-04-02
    • Related Report
      2011 Annual Research Report
  • [Presentation] The Geopolitical Context of Japanese Foreign Relations and National Security Policy2010

    • Author(s)
      Tosh Minohara
    • Organizer
      Mackinder Fellow Lecture
    • Place of Presentation
      リズボン自治大学(ポルトガル)
    • Year and Date
      2010-11-12
    • Related Report
      2010 Annual Research Report
  • [Presentation] Japan's Defense and Security Policy Evolution2010

    • Author(s)
      Tosh Minohara
    • Organizer
      National Defense Symposium
    • Place of Presentation
      国家国防研究所(ポルトガル)
    • Year and Date
      2010-11-10
    • Related Report
      2010 Annual Research Report
  • [Presentation] Fog of Intelligence : The Collapse of U.S.-Japan Negotiations and the Decision for the Pacific War2010

    • Author(s)
      Tosh Minohara
    • Organizer
      Japanese Studies Institute
    • Place of Presentation
      ソウル国立大学(韓国)
    • Year and Date
      2010-10-30
    • Related Report
      2010 Annual Research Report
  • [Presentation] The Intelligence Dimension to Japan's Decision for Pearl Harbor.2010

    • Author(s)
      Tosh Minohara
    • Organizer
      Department of History
    • Place of Presentation
      国立台北大学(台湾)
    • Year and Date
      2010-10-05
    • Related Report
      2010 Annual Research Report
  • [Presentation] 危機における政策決定とインテリジェンス2010

    • Author(s)
      簑原俊洋
    • Organizer
      インテリジェンス研究会
    • Place of Presentation
      霞山会館(東京都)
    • Year and Date
      2010-08-31
    • Related Report
      2010 Annual Research Report
  • [Presentation] 危機における政策決定とインテリジェンス:太平洋戦争前夜の日本外交をケース・スタディーとして2010

    • Author(s)
      蓑原俊洋
    • Organizer
      日本インテリジェンス研究会
    • Related Report
      2011 Final Research Report
  • [Presentation] The Intelligence Dimension to Japan's Decision for Pearl Harbor.2010

    • Place of Presentation
      National Taipei University
    • Related Report
      2011 Final Research Report
  • [Presentation] Fog of Intelligence : The Collapse of U. S.-Japan Negotiations and the Decision for the Pacific War.2010

    • Place of Presentation
      Japanese Studies Institute, Seoul National University
    • Related Report
      2011 Final Research Report
  • [Presentation] 危機における政策決定とインテリジェンス:太平洋戦争前夜の日本外交をケース・スタディーとして2010

    • Organizer
      日本インテリジェンス研究会
    • Related Report
      2010 Self-evaluation Report
  • [Presentation] Crossing the Rubicon : Foreign Minister Togo Shigenori and Japan's Decision for War.2009

    • Author(s)
      Tosh Minohara
    • Organizer
      Asian Studies Conference Japan
    • Place of Presentation
      上智大学(東京都)
    • Year and Date
      2009-06-20
    • Related Report
      2009 Annual Research Report
  • [Presentation] Reexamining the Road to Pearl Harbor : The Intelligence Dimension and Explaining Togo's Volte Face2009

    • Author(s)
      簑原俊洋
    • Organizer
      台湾歴史学会
    • Place of Presentation
      国立精華大学
    • Year and Date
      2009-01-13
    • Related Report
      2008 Annual Research Report
  • [Presentation] National Defense Institute of Portugal

    • Organizer
      Japan's Intelligence and Security Policy Evolution.
    • Related Report
      2011 Final Research Report
  • [Presentation] Geopolitical Context of Japanese Foreign Relations and National Security Policy

    • Place of Presentation
      Lisbon Autonomous University
    • Related Report
      2011 Final Research Report
  • [Presentation]

    • Organizer
      The Intelligence Dimension to Japan's Decision for Pearl Harbor.
    • Place of Presentation
      National Taipei University, Taiwan.
    • Related Report
      2010 Self-evaluation Report
  • [Presentation]

    • Organizer
      Fog of Intelligence : The Collapse of U.S.-Japan Negotiations and the Decision for the Pacific War [in Japanese].
    • Place of Presentation
      Japanese Studies Institute, Seoul National University, South Korea.
    • Related Report
      2010 Self-evaluation Report
  • [Presentation]

    • Organizer
      Japan's Defense and Security Policy Evolution
    • Place of Presentation
      National Defense Institute, Lisbon, Portugal.
    • Related Report
      2010 Self-evaluation Report
  • [Book] Tumultuous Decade : Empire, Society and Diplomacy in 1930s Japan2013

    • Author(s)
      Tosh Minohara
    • Total Pages
      350
    • Publisher
      University of Toronto Press(予定)(掲截確定)
    • Related Report
      2011 Annual Research Report
  • [Book] 「戦争」から読む日米関係2012

    • Author(s)
      Tosh Minohara
    • Total Pages
      328
    • Publisher
      朝日新聞出版
    • Related Report
      2011 Annual Research Report
  • [Book] Tumultuous Decade : Japan's Challenge to the International System2011

    • Author(s)
      Tosh Minohara eds.
    • Publisher
      Toronto : University of Toronto Press
    • Related Report
      2011 Final Research Report
  • [Book] ゼロ年代と日本の重大論点2011

    • Author(s)
      簑原俊洋
    • Total Pages
      311
    • Publisher
      柏書房
    • Related Report
      2011 Annual Research Report
  • [Book] Tumultuous Decade : Japan's Challenge to the International System2011

    • Author(s)
      Tosh Minohara, eds.
    • Publisher
      Toronto: University of Toronto Press, forthcoming Fall
    • Related Report
      2010 Self-evaluation Report
  • [Book] Tumultuous Decade : Japan's Challenge to the International System, 1931-19412011

    • Author(s)
      Tosh Minohara
    • Total Pages
      300
    • Publisher
      University of Toronto Press
    • Related Report
      2010 Annual Research Report
  • [Book] 日米交渉と開戦-『東郷変節の謎に迫る』2010

    • Author(s)
      簑原俊洋
    • Publisher
      朝日新聞出版
    • Related Report
      2011 Final Research Report
  • [Book] 解明・昭和史--東京裁判までの道(日米交渉と開戦--『東郷変節の謎に迫る』)(筒井清忠編)2010

    • Author(s)
      簑原俊洋
    • Publisher
      朝日新聞出版
    • Related Report
      2010 Self-evaluation Report
  • [Book] 『昭和史15の分岐点』の中の「日米交渉と開戦」の章2010

    • Author(s)
      筒井清忠
    • Total Pages
      350
    • Publisher
      朝日新聞出版
    • Related Report
      2009 Annual Research Report
  • [Book] Tumultuous Decade : Japan's Challenge to the International System, 1931-19412010

    • Author(s)
      Tosh Minohara, Masato Kimura
    • Total Pages
      300
    • Publisher
      University of Toronto Press
    • Related Report
      2009 Annual Research Report

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Published: 2008-04-01   Modified: 2016-04-21  

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