In May, Yokohama Mayor Takeharu Yamanaka was invited by the Pope to participate in the international conference 'From Climate Crisis to Climate Resilience' in Vatican City, together with mayors from world-leading cities in the decarbonization sector.

Mayor Yamanaka gave a speech on the city's initiatives in the decarbonization sector, exchanged opinions with the Mayor of Paris and other leaders from cities around the world, deepened exchanges, and confirmed the strengthening of future cooperation. As the only mayor from Asia to give a speech, he discussed the importance of international cooperation, but also of local cooperation with small and medium-sized enterprises (SMEs) and the citizens' manpower, saying that he would like to continue to lead Asia toward the realization of a decarbonized society.

Also in May, as co-organizer the City of Yokohama hosted the EU-Japan Subnational Climate Action Workshop in collaboration with, among others, the EU and European cities to share knowledge and advanced practices. In 2027, Yokohama will be hosting the GREEN×EXPO 2027, which will be a showcase of diverse solutions toward a decarbonized society.