Ten years since the Paris Agreement. To achieve the Zero Emission Tokyo Strategy and contribute to the globally targeted “1.5°C goal”, the Tokyo Metropolitan Government (TMG) formulated “Zero Emission Tokyo Strategy: Beyond Carbon Half” in March 2025. This sets a new target to reduce greenhouse gas emissions by over 60% compared to 2000 levels by 2035, alongside 31 individual targets to realize this ambition.
We shall strategically advance initiatives, including transforming renewable energy into core power sources, maximising energy efficiency, promoting hydrogen applications in society, transitioning to a circular economy, and strengthening adaptation measures. We are committed to establishing ourselves as a globally exemplary “decarbonized city”.
Going beyond Carbon Half targets. TMG is committed to deepening mutual understanding and cooperation with cities worldwide, including through collaborative efforts with ICLEI.
TMG is located in the Kanto Plain, almost in the center of the Japanese archipelago, and consists of the central ward areas, the Tama area, and the island areas (Izu Islands and Ogasawara Islands). Mountainous and hilly areas such as Okutama and Mt Takao, as well as the island areas with rich nature, are designated as natural parks. The Ogasawara Islands are also registered as a World Heritage Site.
TMG is the capital of Japan and the country’s political, economic, and cultural center, with a large number of governmental agencies and major corporations. It is one of the largest cities in the world with a population of about 14 million. It has a variety of attractions, including a highly developed transportation system, pop culture, and food culture that attracts attention from around the world, and a history and traditional culture that dates back to the Edo period.
Population
(As of 1 June 2025)
Area
Approximately 70% of Tokyo’s energy-derived CO2 emissions come from buildings. For this reason, TMG has been implementing building-related measures since 2000, introducing corresponding systems tailored to the building stage (new or existing) and scale (large or small to medium).
The urban cap-and-trade scheme implemented for large-scale enterprises was launched globally as early as 2010, consistently achieving outstanding emission reductions exceeding mandatory targets. Furthermore, as a new initiative, a system requiring mandatory installation of solar power generation equipment by suppliers of new residential buildings and similar developments commenced in April 2025.
From 2022, to realize a decarbonized society, a campaign is being launched to call on businesses and citizens of TMG to change their behavior under the slogan ‘HTT‘ – derived from the Japanese acronym for ‘Herasu (save)’, ‘Tsukuru (generate)’, and ‘Tameru (store)’ electricity.
Moving forward, to expand the scale of renewable energy applications, TMG shall continue to implement effective measures. These include the widespread adoption of Japan’s next-generation solar cell, ‘Air Solar’ – developed domestically and featuring characteristics of being thin, lightweight, and flexible – alongside the introduction of a GW-scale floating offshore wind power facility in the Izu Islands.
Associate Partnership is available to non-governmental organizations, universities, state and national government agencies and not-for-profit research institutions. The purpose of Associate Partnership is to facilitate dialogues between local governments and these partners, to provide knowledge transfer in line with ICLEI’s Mission and Charter, and an avenue for which partners can support ICLEI’s work and mandate.
HARNESS the power of the ICLEI Network!" Governments need to give (the sense of) direction, as Business leaders we don't make the wind, we sail the boats. So policy should set the winds in the right directions if you want the boat going fast to the right harbor."Philippe Joubert Senior Advisor, World Business Council
on Sustainable Development
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