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Digital Archive International History Declassified

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Japanese Nuclear History

 Documents on the history of Japanese nuclear development. (Image: Units 3 and 4 at Japan’s Oi (Ohi) Nuclear Power Plant. 26 January 2012)

  • December 12, 1966

    Disarmament Office, United Nations Bureau, Japanese Foreign Ministry, 'Regarding the Relationship between the Nuclear Non-proliferation Issue and Japan’s Security (Draft)

    The Disarmament Office at the Japanese Foreign Ministry reviews three "problematic" aspects of the NPT from the perspective of Japan's national security.

  • December 16, 1966

    United Nations Bureau, Japanese Foreign Ministry, 'Our Lobbying on the Nuclear Non-Proliferation Treaty (Draft)'

    The Japanese Foreign Ministry plans to convey its views on the proposed nuclear non-prolfieration treaty to the United States, particularly its concerns about how it might affect the US-Japan security alliance and the balance between nuclear weapons states and non-nuclear weapons states.

  • July 10, 1969

    Cable No. 2124, Ambassador Shimoda to the Minister for Foreign Affairs, 'Issues concerning the Signing of the Nuclear Non-Proliferation Treaty (Opinion Statement)

    Ambassador Shimoda cautions that Japan's signing of the NPT still "requires further consideration from a long-term perspective."

  • October 16, 1969

    Disarmament Office, United Nations Bureau, Japanese Foreign Ministry, 'How Our Claim was Incorporated into the Nuclear Non-Proliferation Treaty

    The Japanese Foreign Ministry outlines areas of where Japan's views and positions are evident in the final text of the NPT, including the sections on disarmament, the security of non-nuclear weapon states, the peaceful uses of nuclear energy, and procedural issues.

  • August 30, 1974

    United Nations Bureau, Japanese Foreign Ministry, 'Outline of Arguments For and Against Japan’s NPT Ratification

    A table outlining the various arguments for and against Japan's ratification of the Nuclear Non-Proliferation Treaty.

  • January, 1975

    On Japan's Ratification of the Nuclear Non-Proliferation Treaty (NPT)

    An internal record evaluating the arguments in favor of Japan's ratification of the NPT.

  • April 08, 1975

    First North America Division, American Affairs Bureau, Japanese Foreign Ministry, 'Foreign Minister Miyazawa-Secretary of State Kissinger: Talking Points and Background Material' (Excerpts)

    Talking points on the NPT prepared for a meeting between the Japanese Foreign Minister and Henry Kissinger.

  • April 08, 1975

    Disarmament Office, United Nations Bureau, Japanese Foreign Ministry, 'The NPT Issue (Views of LDP leaders)

    The Office of the Disarmament Affairs summarizes the views of several leading LDP personalities (Matsuno, Nakasone, and Shiina) on the NPT.

  • April 14, 1975

    Japanese Foreign Ministry, 'Opening Statement regarding the Minister for Foreign Affairs Miyazawa’s Visit to the United States'

    A brief summary of Miyazawa's meeting with Kissinger.

  • April 14, 1975

    Disarmament Office, United Nations Bureau, Japanese Foreign Ministry, 'NPT Issue (Briefing of Minister Miyazawa’s Visit to the United States to Directors of Concerned Divisions of the Liberal Democratic Party)

    A summary of a meeting between Foreign Minister Miyazawa and several leading officials from the Liberal Democratic Party regarding Japan's ratification of the NPT.

  • January 24, 1977

    Memorandum, Louis Nozenzo, Bureau of Political-Military Affairs, Department of State, to Joseph Nye et al., enclosing paper on 'US Policy on Foreign Reprocessing'

    A paper describing US Policy on Foreign Reprocessing and questioning economic, environmental and political arguments for reprocessing

  • March 15, 1977

    Memorandum, Patsy Mink, Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs, to Deputy Secretary of State, 'PRC Meeting on PRM-15 Response'

    The memorandum describing the State Department and other agencies' agreement on the need for a fuel cycle evaluation program

  • April 05, 1977

    Memorandum, Patsy Mink, Assistant Secretary of State for Oceans and International Environmental and Scientific Affairs, to Deputy Secretary of State, 'State Department Views on the Partial Response to PD-8,' with attached memorandum from Warren Chr

    The memorandum describing President Carter's decision to indefinitely defer the commercial reprocessing and recylce of plutonium in the US and Japan's firm position in keeping a reprocessing capability.

  • April 14, 1977

    Memorandum of Conversation, 'Non-Proliferation and Reprocessing in Japan,' with Attached 'Possible Basis of Japan-US Understanding of Nuclear Fuel Cycle'

    The memorandum describes Japan's hope that the US will recognize an importance of plutonium technology for Japan and its desire to continue plutonium research and development activities.

  • July 30, 1977

    Memorandum from Ambassador-at-Large and Special Representative for Non-Proliferation Matters Gerard C. Smith, Assistant Secretary of State for East Asian and Pacific Affairs Richard Holbrooke, and Deputy Under Secretary of State for Security Assistan

    The memorandum describes President Carter's comrpomise with Japanese Prime Miniter Fukusa on starting up the Tokai Mura reprocessing plant under one of the State Department's three options.

  • August 31, 1977

    US Embassy Tokyo Telegram 13359 to State Department, 'Significance of the Japanese Offer to Delay Construction of the Plutonium Conversion Plant'

    The cable describing an importance of the Japanese offer to delay construction of the plutonium conversion plant in exchange of them postponing a decision for two years on co-processing.

  • November 14, 1978

    Letter, Ambassador Michael Mansfield to Gerard C. Smith

    The letter describes Ambassador Mansfield's assessment of Japanese nonproliferation policy and Japan's skepticism about President Carter's nuclear policy.

  • February 03, 1979

    US Embassy Tokyo Telegram 02669 to State Department, 'Bilateral Nuclear Consultations with Japan'

    The telegram describing a meeting between US Assistant Secretary of State Thomas Pickering and Japanese Atomic Energy Commissioner Kinya Niizeki on a plan to use a Pacific island as a storage site for spent reactor fuel.

  • August 29, 1979

    Memorandum of Conversation, 'Meeting Between Ambassador Gerard Smith and Japanese Minister of State for Science and Technology [Iwazo] Kaneko'

    The memorandum describes Japanes Minister of State for Science and Technology emphasizing the significance of a plutonium economy given Japan's energy needs.

  • October 11, 1979

    Memorandum to the Files by Gary R. Bray, ACDA/NP/NE [Bureau of Nonproliferation and Regional Arms Control, Nuclear Energy Division], 'Japanese Plutonium Supply and Demand Update'

    The memorandum describing Japan's latest plutonium supply and demand.