Tokyo

Japan
Governor Yuriko Koike, Elected 2016

Case Studies

The Tokyo Cap-and-Trade Program (TCTP) implemented on the 1st of April 2010 is the first such scheme in Asia and Japan. The programme is a stepped-up measure of the Tokyo Carbon Reduction Reporting Program that started in April 2002. Under the former reporting programme, eligible facilities were required to annually report greenhouse gas (GHG) emissions and reduction plans, and were encouraged to reduce emissions. This initiative resulted in an average reduction in GHG emissions of 2%. By the end of FY2012 the current TCTP reached a total GHG emission reduction of 22% from baseline emissions (2009).

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Since 2000, the City of Tokyo has been taking measures to mitigate the impacts of the urban heat island effect, including covering roofs and walls with greenery in order to lower the surface temperature of buildings. To further these efforts, the Tokyo Metropolitan Government passed the Nature Conservation Ordinance in 2001, requiring the greening of building roofs and walls in addition to ground-level greenings for all new construction as well as existing buildings undergoing renovations.

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In Focus City Reports: Tokyo

June 3, 2014 Tokyo

The In Focus city reports provide valuable insight into the efforts of the world's leading cities to become more sustainable. This report has been developed with C40's official reporting partner, CDP Cities, and AECOM, using data submitted through CDP's reporting platform. It conveys information about how Tokyo perceives its climate risk, measures key climate change-related data, and manages climate action. Tokyo was selected as the subject of an In Focus report based on the comprehensiveness of its submission and the quality of its data.

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Tokyo has one of the most efficient water systems in the world. Its method of detecting and repairing leaks has halved the amount of water wasted by the City in the past ten years from 150 million m3 water to 68 million m3 water. Its' focus on same-day-repair work - has helped to drastically reduce the leakage rate - from 20% in 1956 to 3.6% in 2006, as well as reduce carbon dioxide emissions by about 73,000 t CO2 annually.

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Shibaura Water Reclamation Center has built Japan’s first reclaimed wastewater treatment facility that use ceramics in filtering reclaimed wastewater treatment. The coming into operation of this facility will make it possible to meet the needs for toilet water in office buildings and water for sprinkling the streets in the Nagatacho-Kasumigaseki and Yashio-East Shinagawa areas.

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Tokyo’s final waste disposal has decreased about 60% over the past 10 years thanks to efforts by citizens and businesses, etc., while TMG has aggressively implemented pioneering policies ahead of national initiatives to address the global environmental issues that are threatening our survival, to create a low-carbon urban city. However, the climate change crisis and resource constraints are posing great challenges on a global scale. The Panel discussed the desirable future direction of policies and measures pertaining to the sustainable use of resources from a global perspective, aiming to create a sustainable society.

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Tokyo is helping energy companies to reduce CO2 emissions and shift to renewable energy by requiring them to regularly publish the amount of carbon dioxide they are emitting, and demonstrate their plans to shift to renewable supplies. In the first year of operation, six out of nine electricity companies had reduced their emissions by a total of 680,000 tons CO2. The strategy is simple - by requiring energy companies to show customers their green credentials, the City is driving greater competition for renewable-sourced energy. The City wants 20% of all energy to be renewable by 2020.

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Tokyo Metropolitan Government (TMG) has developed a cap-and-trade program that many advanced nations and regions are also moving to implement since the first introduction of such a scheme by the European Union in 2005. TMG’s program is the first one to be implemented in Japan and Asia. It requires installations under the cap to reduce CO2 emission for the 1st period from FY 2010 to FY 2014 by average 6% compared to the base year emission.

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