– ICLEI Japan Member Information –

Yokohama City

Message from the Mayor of Yokohama City 

Takeharu Yamanaka

With the adoption of the Paris Agreement at the 21st Conference of the Parties (COP21) to the United Nations Framework Convention on Climate Change (UNFCCC), expectations for the actions of cities are rising worldwide. Yokohama has set a goal of ‘Zero Carbon Yokohama’ and is working towards decarbonization by 2050, and as an SDGs Future City selected by the Japanese Government, the city is focusing its efforts on creating a sustainable city, including measures to combat global warming. 

Yokohama City has long been working to solve urban issues in cooperation with other cities and international organizations in Japan and abroad. We would like to share our knowledge with the participating cities of ICLEI and promote cooperation and collaboration to create a sustainable society together. 

Overview of Yokohama City

Yokohama City is a beautiful international port city located in the metropolitan area of Japan. In addition to the modern waterfront area symbolized by the Minato Mirai 21 district, the suburbs are filled with lush greenery, residential areas, and farmland, making the city a diverse and attractive place. 

Yokohama’s development was triggered by the opening of the port in 1859. Since then, Yokohama has overcome various hardships such as the Great Kanto Earthquake, rapid population growth, and pollution, and has grown to become the second largest city in Japan with a population of 3.7 million. The urban management knowledge and technological capabilities cultivated during this process have become the foundation for our current international contributions.

In recent years, the city has also been strong in tourism MICE (Meeting, Incentive, Conferences, Exhibitions), hosting many international conferences such as the Asian Development Bank Annual Meeting and the African Development Conference, and attracting 36 million tourists in 2023. 

Basic information

3,773,476

Population
(As of 1 July 2025) 

437.78

Area

Yokohama City Website

Environmental Initiatives 

Yokohama has been a pioneer among other cities in taking measures to combat global warming, such as saving electricity, energy efficiency measures, and expanding the use of renewable energy.

In January 2023, the Yokohama City Action Plan for Global Warming Countermeasures was revised, setting a 2030 greenhouse gas emissions reduction target of 50% (compared to 2013 levels) and working towards virtually zero greenhouse gas emissions in 2050.

In order to achieve this goal, Yokohama is working to create a series of measures to combat global warming in an ‘all-Yokohama’ manner through the introduction of new technologies in cooperation with businesses, smart use of renewable energy in collaboration with other local governments, and activities that utilize the power of citizens. Furthermore, the ‘Minato Mirai 21 area’ was selected as a national ‘Decarbonization Leading Areas’.

Together with our citizens, we will build a model for decarbonization in major cities, aiming to reduce greenhouse gas emissions from electricity consumption to virtually zero by 2030.

Yokohama City’s Initiatives in Addressing Global Warming

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