Delegation attended the Third Meeting of States Parties to the Treaty on the Prohibition of Nuclear Weapons

March 2025

A Mayors for Peace delegation, including Vice President Belit Onay (Mayor of Hannover) and Secretary General Takehiro Kagawa, attended the Third Meeting of States Parties (3MSP) to the Treaty on the Prohibition of Nuclear Weapons (TPNW) in New York, US. At the 3MSP, they expressed profound concern regarding the devastating humanitarian consequences of the use of nuclear weapons, called for advancing discussions to ensure the effective implementation of the TPNW, and urged the representatives of national governments and the UN to make concrete progress toward nuclear disarmament.

Moreover, Mayors for Peace hosted a joint side event for the 3MSP with ICAN (the International Campaign to Abolish Nuclear Weapons) aimed at building momentum toward achieving a peaceful world free of nuclear weapons.

Furthermore, at the United Nations Headquarters, the venue of the 3MSP, Mayors for Peace hosted the Mayors for Peace Atomic Bomb Exhibition, Exhibition of Children’s Art Competition “Peaceful Towns” and VR Experience, to have the 3MSP attendees deepen their understanding of the realities of the atomic bombings of Hiroshima and Nagasaki, and the initiatives of Mayors for Peace.

Period of Delegation Stay: March 3 (Mon.) – March 6 (Thu.), 2025

Speeches at the General Exchange of Views of the TPNW 3MSP (March 5)

Vice President Onay and Secretary General Kagawa delivered the Mayors for Peace statement during the General Exchange of Views session on March 5.

In his speech, Secretary General Kagawa emphasized that Mayors for Peace places great importance on the TPNW. He also highlighted that Nihon Hidankyo’s receipt of the Nobel Peace Prize reaffirms to the entire international community, including nuclear-armed states, the message that the use of nuclear weapons is never acceptable.

Following this, Vice President Onay spoke about the severe destruction the City of Hannover suffered during the Second World War. He noted that the TPNW has opened a way to achieve the abolition of nuclear weapons, specifically at a time when the risks posed by nuclear weapons are increasing. Concluding his speech, he urged all states to ratify the TPNW and to initiate a foreign policy shift toward a peaceful resolution of conflicts through dialogue in good faith.

Vice President Onay delivering his speech

Mayors for Peace statement at the Third Meeting of States Parties to the Treaty on the Prohibition of Nuclear Weapons
by Vice President (Mayor of Hannover) and Secretary General

Meetings with Delegation Representatives

Meetings with Representatives of the TPNW States Parties

Meeting with the Permanent Representative of Thailand to the United Nations (March 3)

After introducing Mayors for Peace initiatives to representatives of Thailand, Vice President Onay emphasized the importance of engaging younger generations in peace activities. Ambassador Cherdchai acknowledged that while peace awareness among young people is growing, the situation varies by country and region. He also expressed Thailand’s commitment to continued collaboration with Japan, including learning about the inhumanity of nuclear weapons through the experiences of the atomic-bombed cities.

Meeting with Amb. Cherdchai (center)

Meeting with the Deputy Foreign Minister in charge of multilateral affairs of Mexico (March 4)

Vice President Onay emphasized the importance of improving global understanding of nuclear weapons and passing down the tragedies of Hiroshima and Nagasaki, as two generations have passed since the atomic bombings. Deputy Foreign Minister Ochoa expressed a desire to build a stronger cooperative relationship, noting that current nuclear weapons are so precise that they pose a threat to our free world. Additionally, both sides agreed to convey the realities of the atomic bombings to future generations through Mayors for Peace materials and to spread them via the media.

Meeting with Deputy Foreign Minister Ochoa (left)

Meeting with the Deputy Permanent Representative of Ireland to the Conference on Disarmament (March 5)

Vice President Onay provided an overview of Mayors for Peace and mentioned that 16 local governments joined our network at the affiliation ceremony held during President Matsui’s visit to Ireland. Mr. Robinson commended the Mayors for Peace initiatives, particularly the focus on peace education for younger generations. He also noted that the Meetings of States Parties of the TPNW serve as a platform where they engage with various civil society groups, including Mayors for Peace. He expressed a desire for these meetings to contribute to the concrete development of nuclear weapons abolition through a wide range of discussions.

Meeting with Mr. Robinson (center)

Meeting with the Acting Deputy Director of Nuclear Disarmament and Non-Proliferation of South Africa (March 5)

Mr. Mahomed stated that South Africa had dismantled all the nuclear weapons that it once possessed and moved away from a national security policy reliant on nuclear deterrence. He also expressed South Africa’s commitment to working with Mayors for Peace to achieve a world free from nuclear weapons. Secretary General Kagawa requested South Africa’s continued cooperation and expressed hope that the country would take a leading role in peace-related activities, including Mayors for Peace initiatives, in Africa.

Meeting with Mr. Mahomed (second from the left)

Meeting with the President of TPNW 3MSP (March 5)

Vice President Onay emphasized the importance of building a common consensus to achieve a world without nuclear weapons by expanding the Mayors for Peace network and strengthening our initiatives globally. To this end, he sought support for increasing Mayors for Peace membership in Kazakhstan. Ambassador Rakhmetullin, President of the 3MSP, noted that initiatives led by local governments might have some difficulties due to their relationship with national governments. However, he also emphasized that, while the elimination of nuclear weapons is challenging, the networks on the city and citizens level that Hiroshima and Nagasaki aim to build are vital to achieving it.

Meeting with President Rakhmetullin (right)

Meeting with the Director of the Department for Disarmament, Arms Control, and Non-Proliferation at the Austrian Ministry of Foreign Affairs (March 6)

Vice President Onay mentioned that it is important for Mayors for Peace to advance nuclear disarmament in collaboration with as many citizens as possible. Ambassador Kmentt acknowledged that public awareness of nuclear weapons is at an all-time high due to the Russian invasion of Ukraine. Additionally, he expressed concerns regarding the nuclear shield and nuclear sharing in Europe, as proposed by the French President, and also expressed his expectation that citizens in Germany, where more than 900 cities are members of Mayors for Peace, will actively participate in efforts toward nuclear disarmament.

Meeting with Director Kmentt (right)
Meetings with Representative of the United Nations and others

Meeting with the Assistant Secretary-General, Assistant Administrator, and Director of the Crisis Bureau at the United Nations Development Programme (UNDP) (March 3)

Secretary General Kagawa provided an overview of Mayors for Peace and emphasized that it is essential to work in solidarity with UNDP to “realize safe and resilient cities”, one of the key objectives outlined in the PX Vision of Mayors for Peace. Assistant Secretary-General Noda mentioned the possible consideration of regional level collaboration between UNDP and Mayors for Peace, and they discussed the potential for future cooperation.

Meeting with Assistant Secretary-General Noda (second from the left)

Meeting with the Assistant Secretary-General and Deputy Executive Director, Partnerships, of UNICEF (March 3)

Assistant Secretary-General Kitty van der Heijden noted that UNICEF has been implementing efforts to ensure children can live safely and maintain their security guarantees. She also expressed gratitude for the support from Japan. Secretary General Kagawa mentioned that issues surrounding nuclear weapons are not solely the concern of national governments and emphasized the need to raise voices at the local level. He also sought concrete cooperation for Mayors for Peace initiatives, including the Children’s Art Competition “Peaceful Towns”.

Meeting with Assistant Secretary-General van der Heijden (right)

Meeting with the UN Under-Secretary-General and High Representative for Disarmament Affairs (March 5)

Vice President Onay explained that while some people believe it is better to rely on the nuclear shield and nuclear umbrella amid the current global turmoil, others support the vision from the atomic-bombed city of Hiroshima, and that Mayors for Peace membership is increasing. UN Under-Secretary-General Nakamitsu mentioned that while there are both expectations and concerns regarding nuclear disarmament, the voices of civil society are the most important in a democracy. She also noted that discussions had advanced at various forums during the 3MSP and emphasized the crucial need to move forward, particularly with younger generations. Additionally, she highlighted that as this year marks the 80th anniversary of both the atomic bombings and the establishment of the UN Charter, it is vital to contemplate peace in various aspects and gain perspectives for the future.

Meeting with UN Under-Secretary-General Nakamitsu (center)
Meeting with NGO Representatives

Meeting with the Executive Director of ICAN (March 5)

During discussions about how to involve non-state parties in the TPNW, Vice President Onay shared his vision of continuing to urge the German government to join the treaty, which postponed its participation as an observer in the 3MSP, in collaboration with the Mayors for Peace member cities within the country. Both sides agreed to maintain close collaboration between ICAN and Mayors for Peace in the future. After the meeting, Executive Director Parke experienced the VR tool that the Mayors for Peace delegation had brought and noted that it is an effective means of conveying the realities of the atomic bombings.

Meeting with Executive Director Parke (third from the left)

Meeting with the Representative of Pathways to Peace (March 6)

Mr. Jani shared his background, including the experience visiting Hiroshima through his participation in the Hiroshima-ICAN Academy, his efforts to urge the Albanian government, a NATO member, to sign and ratify the TPNW, and his work in encouraging local governments to join the Mayors for Peace. Secretary General Kagawa expressed gratitude for his contributions and sought continued cooperation in engaging Albanian members in concrete Mayors for Peace initiatives, such as the Atomic Bomb Poster Exhibition and the Children’s Art Competition “Peaceful Towns”.

Meeting with Mr. Jani (left)

Events during the 3MSP

Mayors for Peace and ICAN Joint Side Event (March 4)

Amid a packed audience of approximately 70 people, with some standing, Mayors for Peace and ICAN hosted a Joint Side Event for the 3MSP, Voices of Civil Society for a Nuclear-Weapon-Free World. Vice President Onay opened the event with his remarks. Facilitated by Associate Professor Keiko Nakamura from RECNA at Nagasaki University, the event proceeded as follows:

Mr. Jiro Hamasumi, Assistant Secretary-General of Nihon Hidankyo, shared his background, including how he learned about his in-utero exposure to the atomic bombing and the situation at the time of the atomic bombing. He also highlighted the significance of Nihon Hidankyo receiving the Nobel Peace Prize, and the urgent need to abolish nuclear weapons as a representative of hibakusha. 

Following this, Ms. Magritte Gordaneer, Lead Organizer and Policy Coordinator at Physicians for Social Responsibility (PSR), and Ms. Rooj Ali, Youth Coordinator at Reverse the Trend (RTT), Canada, each gave presentations on their peace efforts as youth representatives.

During the subsequent interactive session between hibakusha and youths, Assistant Secretary-General Hamasumi expressed his hope that those who listened to hibakusha testimonies, whether in person or online, would share them with their families and friends, helping to spread the realities of the atomic bombings throughout the world.

The event concluded with remarks by Mr. Daniel Högsta, Deputy Director of ICAN, who provided feedback on each presentation and emphasized his commitment to continuing such events to broaden participants’ perspectives.


Joint Side Event

Attendance at the Joint Side Event hosted by Back from the Brink, ICAN, and others (March 4)

The Mayors for Peace delegation attended a side event primarily organized by Professor Hirokazu Miyazaki of Northwestern University, focusing on discussions regarding establishing organizations and policymaking for nuclear disarmament at the city level. During the event, video messages from Mayor Matsui of Hiroshima and Mayor Suzuki of Nagasaki were screened, and Vice President Onay introduced initiatives of the German Chapter of Mayors for Peace, as well as efforts of German member cities. Additionally, mayors of US member cities of Mayors for Peace gave presentations on their activities, emphasizing the importance of collaboration among cities. Participants discussed the need for local governments to actively engage in nuclear abolition, as cities—rather than national governments—are the direct targets of nuclear weapons.

Side event

Mayors for Peace Hosted Atomic Bomb Poster Exhibition, Children’s Art Competition “Peaceful Towns”, and VR experience (March 3- March 7)

During the 3MSP at the United Nations Headquarters, Mayors for Peace hosted the Atomic Bomb Poster Exhibition, the Children’s Art Competition “Peaceful Towns” Exhibition, and a VR experience, aiming at having the 3MSP attendees and UN officials deepen their understanding of the realities of the atomic bombings of Hiroshima and Nagasaki, the inhumanity of nuclear weapons, and the initiatives of Mayors for Peace. Approximately 80 people experienced the VR each day, sharing their feedback, including “These images are important. We should never forget.” and, “I deeply felt the importance of peace.” The event was a great success.

Atomic Bomb Exhibition
“Peaceful Towns” Exhibition
VR experience