This year’s global climate conference could be a watershed year for cities and regions

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ICLEI and UN-Habitat to Host Joint COP28 Multilevel Action & Urbanization Pavilion Press Releases

Global stage for highlighting the role of cities, towns, regions and other subnationals as climate action leaders

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ICLEI Japan 30th anniversary

ICLEI Japan marks its 30th Anniversary on 14 October 2023

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ICLEI World Congress 2024

19 – 21 June 2024, São Paulo, Brazil

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Transparent policy making is essential for sustainable urban freight

Local and regional governments are taking action to tackle urban freight issues. Find out how in the 'EcoLogistics Handbook'.

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Daring Cities 2023

Become a member of CitiesWithNature!


The Paris Agreement's Global Stocktake needs YOUR input! Join the #Stocktake4ClimateEmergency movement.

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The G7 Sustainable Urban Development Ministers’ Meeting in Takamatsu, Kagawa

7 to 9 July 2023, Takamatsu, Kagawa

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Call for participation in the Global Plastic Treaty to reduce plastic use

G7 make historic commitment to work with cities on subnational climate actions

Japan Office Introducing Our Members

Since 1993, ICLEI Japan has been connecting member municipalities in Japan with ICLEI’s international network.

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ICLEI – Local Governments for Sustainability

ICLEI – Local Governments for Sustainability is a global network of more than 2500 local and regional governments committed to sustainable urban development. Active in 125+ countries, we influence sustainability policy and drive local action for low emission, nature-based, equitable, resilient and circular development. Our Members and team of experts work together through peer exchange, partnerships and capacity building to create systemic change for urban sustainability.

About ICLEI Japan

ICLEI Japan was founded in 1993, as one of the country offices of ICLEI – Local Governments for Sustainability, and serves to build and enhance the local governments’ network in Japan. ICLEI Japan supports the member cities to lead local initiatives, to promote global collaboration to achieve regional and global sustainability in partnership with other ICLEI offices and partner organizations. The profile of ICLEI Japan’s Members and mayors’ messages can be found here.

Our Activities

Our network in numbers


Cities, towns and regions


Countries worldwide


% Global urban population


% Global population

Our network

Tokorozawa City 

The Tokorozawa City area, once a wilderness on the Musashino Plateau, includes Nakatomi and Shimotomi in Tokorozawa City and Kamitomi in Miyoshi Town, which are collectively known as ‘Santome.’ Yanagisawa Yoshiyasu, who became lord of the Kawagoe Domain in 1694, promoted the development of new agricultural land in the area.
These farms were divided into strips of land, each with a house, farmland, and woodland that occupied 30% of those lands, assigned to farmers from various regions. Farmers practised a cyclic farming method, using fallen leaves as compost for arable land and maintaining thickets with crop waste. This traditional method enhances soil quality, boosts agricultural production, and supports zero emissions.

Known as ‘Musashino Fallen Leaf Compost Farming,’ it was designated a World Agricultural Heritage Site on July 6, 2023. This 300-year-old tradition highlights Japan’s pioneering role in the realisation of a circular economy and 30by30.

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