| Date |
Contents |
Number of member cities |
| Apr. 2, 2002 | The City of Leon joined Mayors for Peace. | 1 |
| July 7, 2008 | Mr. Pablo Fernando Martinez Espinoza, Minister of Transport and Infrastructure visited Hiroshima. We asked for his support to increase our membership in Nicaragua. Minister Martinez kindly called for Nicaraguan cities to join Mayors for Peace when he went back to Nicaragua. | - |
| Aug. 6 | H. E. Mr. Saul Arana Castellon, Ambassador of the Republic of Nicaragua to Japan, visited Hiroshima to attend the Peace Memorial Ceremony. | - |
| Sep. 1 | 25 new citied joined Mayors for Peace. | 26 |
| Oct. 27 | Mayor Akiba met Father Miguel d'Escoto Brockmann, President of the 63rd UN General Assembly, at the UN Headquarters in New York and asked for support for Mayors for Peace with CANT petitions (370,221 signatures). | - |
| Nov. 4 | 14 new cities joined Mayors for Peace. | 40 |
| Jan. 6, 2009 | 32 new cities joined Mayors for Peace. | 72 |
| Apr. 24 | H. E. Mr. Saul Arana Castellon, Ambassador of the Republic of Nicaragua to Japan, visited Hiroshima to meet Mayor Akiba and visit the Hiroshima Peace Memorial Museum. | - |
| May 7 | Mayor Akiba met Father Miguel d’Escoto Brockmann, President of the UN General Assembly at the Embassy of Nicaragua in Washington DC. | - |
| July 23 | Mayor Akiba asked for support for the activities of Mayors for Peace at the Meeting of Ambassadors to Latin American and Caribbean Countries [GRULAC] in Tokyo. H. E. Mr. Saul Arana Castellon, Ambassador of the Republic of Nicaragua attended. | - |
| Aug. 6 |
| Father Miguel d’Escoto Brockmann, President of the UN General Assembly, visited Hiroshima to make a speech at the Peace Memorial Ceremony. |
| H. E. Mr. Saul Arana Castellon, Ambassador of the Republic of Nicaragua to Japan, visited Hiroshima to attend the Peace Memorial Ceremony. |
| - |
| Aug. 8 | Father Miguel d’Escoto Brockmann, President of the UN General Assembly, made a speech at the 7th General Conference of Mayors for Peace in Nagasaki. | - |
| Nov. 2 | 1 prefecture, 46 cities and 1 administrative district joined Mayors for Peace. | 120 |
| Jan. 15, 2010 | Mayor Akiba visited the Embassy of Nicaragua in Tokyo, and had a meeting with H. E. Mr. Samuel Santos, Minister of Foreign Affairs, and Ambassador Arana of Nicaragua and asked them for their support. | - |
| Jan. 16 - 18 | Mayor Akiba visited Nicaragua, and attended the meeting of AMUNIC (Association of Nicaragua Municipalities) on Jan. 18. The news that all 153 cities will become members was released. President Daniel Jose Ortega Saavedra awarded Mayor Akiba the Cultural Order Ruben Dario. | - |
| Feb. 1 | 1 new city joined Mayors for Peace. | 121 |
| Mar. 1 | 31 new city joined Mayors for Peace. | 152 |
| Mar. 4 | We received a book of 153-city registration forms to join Mayors for Peace (including 3 non-member cities) through the Ministry of Foreign Affairs. | - |
| Apr. 1 | The remaining 3 cities (153 cities in Nicaragua) joined Mayors for Peace. | 155 |