Posted by: ctbtonewsroom | May 2, 2017



Minister for Foreign Affairs of Japan,
Minister for Foreign Affairs of Kazakhstan
Executive Secretary of the CTBTO PrepCom

2 May 2017, at the occasion of the NPT Preparatory Committee meeting, Vienna

As Co-Coordinators of the Article XIV process and as the Executive Secretary of the CTBTO PrepCom, we appeal for a renewed and revitalized effort towards entry into force of the Comprehensive Nuclear-Test-Ban Treaty (CTBT).

The vast majority of the international community has recognized that the entry into force of the Treaty is a practical and pragmatic way to advance nuclear disarmament as envisaged in the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). However, it remains “unfinished business”.

Drawing on the experiences of Japan and Kazakhstan in suffering the disastrous consequences of nuclear weapons, we seek the following effort and commitment to the CTBT in pursuing a world free of nuclear weapons:

We strongly deplore the nuclear tests by North Korea, the only country in the 21st century to have flouted the norm against nuclear testing. We strongly urge North Korea to refrain from conducting any further nuclear tests and emphasize that the CTBT plays a critical role in responding to the challenge posed by North Korea by reinforcing the no-test norm.

We acknowledge that the CTBT verification regime is functioning as designed by the Treaty, as clearly shown in the detection of nuclear testing by North Korea.

We call for the eight remaining Annex 2 States to ratify the CTBT without further delay and without waiting for other countries to ratify the Treaty.

We welcome UN Security Council Resolution 2310 (2016), which stresses the vital importance and urgency of achieving the early entry into force of the CTBT.

We emphasize the importance of continued political commitments and efforts of all countries concerned to facilitate ratification by the remaining Annex 2 States.

We encourage non-signatory Annex 2 States to sign the CTBT, and as a first step toward signature, engage with the CTBTO PrepCom by participating as observers.

We welcome positive undertakings by the remaining Annex 2 States in recent years, such as domestic educational activities and the certification of International Monitoring System (IMS) stations. We further encourage their enhanced efforts, including the further build-up of IMS stations within their territories and the transmission of data to the International Data Centre (IDC).

We stress the importance of joint efforts to address issues that present obstacles to the ratification by the remaining Annex 2 States and stress the potential benefits of making efforts at a regional level, where applicable, to create an environment conducive to their ratification.

We welcome the recent ratification of the Treaty by the Republic of the Union of Myanmar and the Kingdom of Swaziland.

We welcome all initiatives, including convening regional conferences and workshops, aimed at raising awareness of the CTBT, including the initiative of Japan to convene a Regional Conference for States in the South East Asia, the Pacific and the Far East Region (SEAPFE) in Tokyo in July 2017 and International Conference “Monitoring of nuclear tests and their consequences” convened by Kazakhstan on a biennial basis.

We commit ourselves to expand youth networks, including seeking synergies with the activities of both Japan’s “Youth Communicators for a World without Nuclear Weapons” and the CTBTO Youth Group.

We recognize the significance of the ATOM (“Abolish Testing. Our Mission”) campaign initiated in Kazakhstan and aimed at a complete nuclear tests ban in support of the CTBT.

We confirm our commitment and cooperation to facilitate the early completion of the IMS and the further strengthening of its functions and recall the voluntary contributions provided to the CTBTO PrepCom by all States, and in particular by Japan.

We call for those countries that have not yet done so to host monitoring stations as designed by the Treaty in order to fully establish the IMS.

We commit ourselves to further cooperate in capacity building for national data centres, particularly in developing countries.


For further information on the CTBT, follow us on Twitter and please see – your resource on ending nuclear testing, or contact:

Elisabeth Wächter,
Chief of Public Information
T    +43 1 26030-6375
M    +43 699 1459 6375

Vienna, 2 May 2017

On 2 May 2017, CTBTO Executive Secretary Lassina Zerbo delivered the following statement to the 2017 Preparatory Committee (PrepCom) for the 2020 Review Conference (RevCon) of the Parties to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT).

The 2017 NPT PrepCom, which runs from 2 May to 12 May at the Vienna International Centre, is the first of three sessions that are scheduled to be held leading up to the 2020 NPT RevCon. At the three PrepCom sessions, States parties to the NPT, will discuss substantive and procedural issues relating to the Treaty and the 2020 NPT RevCon. The Chair of the 2017 NPT PrepCom is Ambassador Henk Cor Van der Kwast of the Netherlands. In the opening session, distinguished speakers including Japanese Foreign Minister Fumio Kishida, underlined the vital importance of an in-force CTBT in the NPT context.

Widely regarded as the cornerstone of the nuclear non-proliferation regime, the NPT (PDF) opened for signature in 1968, entered into force in 1970, and was extended indefinitely at the 1995 NPT RevCon. Based on three pillars (non-proliferation, disarmament and peaceful uses of nuclear energy), the NPT was negotiated to prevent the spread of nuclear weapons, to further the goals of nuclear disarmament and general and complete disarmament, and to promote cooperation in the peaceful uses of nuclear energy. NPT Review Conferences take place every five years (the last RevCon was in 2015), and a PrepCom session takes place on each of the three years preceding a RevCon.

Read the Executive Secretary’s Statement here (PDF).

Posted by: ctbtonewsroom | April 27, 2017

MEDIA ADVISORY: Joint Appeal by Japan, Kazakhstan, CTBTO

Vienna, 27 April 2017

On 2 May 2017, CTBTO Executive Secretary Lassina Zerbo will be joined by Japanese Minister of Foreign Affairs Fumio Kishida, and Kazakh Ambassador and Permanent Representative Kairat Sarybay to issue a joint appeal by the foreign ministers of Japan and Kazakhstan, and CTBTO, on the Comprehensive Nuclear-Test-Ban-Treaty on the occasion of the meeting of the 2017 Preparatory Committee for the 2020 NPT Review Conference in Vienna. The appeal will be preceded by a bilateral meeting between Minister Kishida and the Executive Secretary.


  • Photo opp: CTBTO Executive Secretary’s office (E0754): 14:55
  • Media stakeout: E 702: 15:10. Media representatives are requested to arrive by 15:00 to set up.
  • Following the stakeout, a recording and photographs will be made available via CTBTO’s website and Flickr page.

Media representatives wishing to participate in the media stakeout are requested to register by emailing Journalists with permanent accreditation to the VIC need no further credentials. All others must seek accreditation (contact Veronika Crowe-Mayerhofer (+43-1) 26060-3342 Accreditation will be at the Gate 1 entrance to the VIC.

The CTBT bans all nuclear explosions, thus hampering both the initial development of nuclear weapons as well as significant enhancements. The Treaty also helps prevent damage caused by nuclear testing to humans and the environment.

The CTBT has so far been signed by 183 States and ratified by 166. Its entry-into-force formula prescribes that 44 particular “nuclear technology holder” States need to ratify for it to enter into force. Eight of them have yet to ratify: China, the Democratic People’s Republic of Korea (DPRK), Egypt, India, Iran, Israel, Pakistan, and the United States (the DPRK, India and Pakistan have also not yet signed the Treaty).

A verification regime to monitor the globe for nuclear explosions is nearing completion with around 90 percent of the 337 planned International Monitoring System (IMS) facilities already in operation (see interactive map).

For further information on the CTBT, follow us on Twitter and please see – your resource on ending nuclear testing, or contact:

Elisabeth Wächter
Chief, Public Information
T    +43 1 26030-6375
M    +43 699 1459 6374

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