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Japan's National Greenhouse Gas Emissions in Fiscal Year 2017 (Final Figures)

April 16, 2019

The Ministry of the Environment and the National Institute for Environmental Studies have released Japan's National Greenhouse Gas Emissions (final figures1) for fiscal year (FY) 2017.

Total emissions2 in FY2017 were 1,292 million tonnes of carbon dioxide equivalents (Mt CO2 eq.), a 1.2% decrease compared to those of FY2016; a 8.4% decrease compared to FY2013; and a 6.5% decrease compared to FY2005.

The main factor for the lower emissions as compared to FY2016 is the decrease in energy-related CO2 emissions due to the increase in the share of non-fossil fuels within the domestic energy supply brought by the wider adoption of renewable energy such as solar and wind power and the resumption of nuclear power plant operation.

Under Articles 4 and 12 of the United Nations Framework Convention on Climate Change (hereinafter, the Convention) and relevant decisions adopted by the Conference of the Parties, the Annex I parties including Japan (i.e. developed countries) are required to prepare national greenhouse gas (GHG) inventories and submit them to the Secretariat of the Convention. Moreover, Article 7 of the Act on Promotion of Global Warming Countermeasures, which provides for domestic measures under the Convention, requires the Government of Japan to annually estimate and make public Japan's GHG emissions and removals.

In accordance with these Articles, Japan's GHG emissions in FY2017 were estimated.

Japan's total greenhouse gas emissions in FY2017 were 1,292 million tonnes of carbon dioxide equivalents (Mt CO2 eq.).

This is a decrease of 1.2% (16 Mt CO2 eq.) when compared to the FY2016 emissions (1,308 Mt CO2 eq.), mainly because of the decrease in energy-related CO2 emissions due to the increase in the share of non-fossil fuels within the domestic energy supply brought by the wider adoption of renewable energy such as solar and wind power and the resumption of nuclear power plant operation, despite the increase in hydrofluorocarbon emissions from refrigerants that substitute for ozone-depleting substances.

This is also a decrease of 8.4% (119 Mt CO2 eq.) when compared to the FY2013 emissions (1,410 Mt CO2 eq.), mainly because of the decrease in energy-related CO2 emissions due to the decrease in energy consumption owing to energy conservation, and the increase in the share of non-fossil fuels within the domestic energy supply brought by the wider adoption of renewable energy such as solar and wind power and the resumption of nuclear power plant operation, despite the increase in hydrofluorocarbon emissions.

Furthermore, this is a decrease of 6.5% (90 Mt CO2 eq.) when compared to the FY2005 emissions (1,382 Mt CO2 eq.), mainly because of the decrease in energy-related CO2 emissions due to the decrease in energy consumption owing to energy conservation, despite the increase in hydrofluorocarbon emissions.

Removals by forest and other carbon sinks3 under the Kyoto Protocol in FY2017 were 55.7 Mt CO2 eq., consisting of 47.6 Mt CO2 eq. by forest carbon sinks and 8.1 Mt CO2 eq. by cropland management, grazing land management, and urban revegetation.

Footnote:

1. "Final figures" means the figures officially submitted to the Secretariat of the Convention as Japan's GHG emissions and removals in the national GHG inventory. The final figures compiled this time may be recalculated when annual values in statistical data are updated, and/or estimation methods are revised.

2. There are some differences between the final figures compiled this time and the preliminary figures released on November 30th, 2018, because some recalculation was conducted based on annual values in statistics and other data which were made available after the estimation of the preliminary figures, and some estimation methods were further revised. The preliminary figures for GHG emissions in FY2017 were a 1.0% decrease compared to FY2016 (8.2% decrease and 6.2% decrease when compared to FY2013 and FY2005, respectively).

3. The removals by forest and other carbon sinks reported this time were estimated by calculating emissions/removals from activities under the Kyoto Protocol, in accordance with the decision of the 8th session of the Conference of the Parties serving as the meeting of the Kyoto Protocol.

Attached File:

Japan's National Greenhouse Gas Emissions in Fiscal Year 2017 (Final Figures) <Executive Summary>

April 16, 2019

Ministry of the Environment

Government of Japan

Greenhouse Gas Inventory Office of Japan

National Institute for Environmental Studies

For Japanese

Attached File:

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