Ryoichiro Orii, Director of the International Bureau of the City of Yokohama, spoke at the World Cities Summit Mayor’s Forum 2025, which took place in Vienna, Austria, from 2-4 July 2025.

On 23 June 2025, the Chief Representative of the European Office of the City of Yokohama, on behalf of Mayor Yamanaka, attended an international conference in Paris to mark the tenth anniversary of the Paris Agreement. City leaders and international organizations from around the world came together to promote the achievements of the Paris Agreement and express further solidarity towards COP30.