Japan’s National Greenhouse Gas Emissions and Removals inFiscal Year 2022 <Executive Summary>

1. Greenhouse Gas Emissions and Removals1
Japan’s greenhouse gas (GHG) emissions and removals in fiscal year 2,3 (FY) 2022:
1,085 million tonnes of carbon dioxide equivalent (Mt CO2 eq.4), indicating a 2.3% (25.1 Mt CO2 eq.)
decrease compared to FY2021.
Emissions5 for FY2022: 1,135 Mt CO2 eq. (a 2.5% [28.6 Mt CO2 eq.] decrease compared to FY2021)
Removals6 for FY2022: 50.2 Mt CO2 eq. (a 6.4% [3.4 Mt CO2 eq.] decrease compared to FY2021)
 This represented a 22.9% (322.1 Mt CO2 eq.) decrease compared to FY20137 (1,407 Mt CO2 eq.).

Emissions and Removals(Mt-CO2 eq.)

1,500
1,400

63.1

60.1

1,300
1,200

58.8

59.5
59.0

54.1
52.1

1,407

1,100

1,295

1,259

1,242

1,227

1,000

1,183

1,152

2018

2019

53.6

50.2

1,090

1,110

1,085

2020

2021

2022

9000
2013

2014

2015

2016

2017

(Fiscal year)
Emissions and removals

Removals by forests and other carbon sink measures

Figure 1 Trends in Japan’s national GHG emissions and removals
Footnote:
1. Japan's removals by measures for forest and other carbon sinks were subtracted from the sum of emissions. The final compiled figures
may be recalculated when the annual statistical data are updated and/or when estimation methods are revised.
2. Japan’s fiscal year runs from April 1 to March 31.
3. Emissions of four types of GHGs (hydrofluorocarbons [HFCs], perfluorocarbons [PFCs], sulfur hexafluoride [SF6], and nitrogen
trifluoride [NF3]) were estimated on a calendar year basis.
4. Emissions of each GHG were converted into CO2 equivalents by multiplying the emissions of each gas with their respective global
warming potential values (GWP values). GWP values are the degree to which each GHG contributes to global warming and are
expressed as a ratio to the global warming effect of CO2. Based on the Paris Agreement rules, the GWP values for a 100-year time
horizon provided in the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (2013) were adopted.
5. Sum of Japan’s emissions.
6. Contribution of measures for forest and other carbon sinks to GHG removals and reduction. This was accounted for based on Japan'sPlan for Global Warming Countermeasures and the Nationally Determined Contribution (NDC).
7. In the updated NDC submitted to the United Nations in October 2021, Japan expressed that it “aims to reduce its greenhouse gas
emissions by 46 percent in fiscal year 2030 from its fiscal year 2013 levels, setting an ambitious target which is aligned with the longterm goal of achieving net-zero by 2050. Furthermore, Japan will continue strenuous efforts in its challenge to meet the lofty goal ofcutting its emission by 50 percent.”

12. Greenhouse Gas Emissions8
GHG emissions of Japan in FY 2022: 1,135 Mt CO2 eq.
 Emissions decreased by 2.5% (28.6 Mt CO2 eq.) compared to emissions in FY2021 (1,164 Mt CO2 eq.).
 Emissions decreased by 19.3% (271.9 Mt CO2 eq.) compared to emissions in FY2013 (1,407 Mt CO2 eq.).

Figure 2 Japan’s national GHG emissions
Note: The main factor for the decrease in emissions as compared to FY2021: the reduced energy consumption
resulting from a decrease in electricity generation and iron and steel production.
 The two main factors for the decrease in emissions as compared to FY2013: the reduced energy
consumption (due to improved energy conservation, etc.) and the decrease in CO2 emissions fromelectricity production due to the wider use of low-carbon electricity (because of wider adoption ofrenewable energy and resumption of nuclear power plant operations).
 The emissions of hydrofluorocarbons that had been increasing every year since 2004 turned downward.

Footnote:
8. GHG emissions for each fiscal year and rates of change from the preceding years do not include removals by measures for forest andother carbon sinks.

2

Table 1 Japan’s national GHG emissions by gas in FY2022(compared to FY2013 and FY2021)

1,275

1,407

1,164

1,135

FY2022
Amount of change《Rate of change》
Compared toCompared toFY2013
FY2021-271.9-28.6[100%][100%][100%][100%]《-19.3%》

1,163

1,318

1,064

1,037

-280.9-27.0[91.2%][93.6%][91.4%][91.3%]《-21.3%》《-2.5%》FY1990emissions[Share]TotalCarbon dioxide (CO2)Energy-related CO2
Non-energy-related CO2
Methane (CH4)
Nitrous oxide (N2O)
F-gases
Hydrofluorocarbons (HFCs)
Perfluorocarbons (PFCs)
Sulfur hexafluoride (SF6)
Nitrogen trifluoride (NF3)

FY2013emissions[Share]FY2021emissions[Share]Emissions[Share]《-2.5%》

1,068

1,235

987

964

-271.3-23.0[83.7%][87.8%][84.8%][84.9%]《-22.0%》《-2.3%》

95.3

82.2

76.6

72.6

-9.6

-4.0

[7.5%][5.8%][6.6%][6.4%]《-11.7%》《-5.2%》

49.8

32.7

30.4

29.9

-2.8

-0.51[3.9%][2.3%][2.6%][2.6%]《-8.6%》《-1.7%》

28.9

19.9

17.6

17.3

-2.6

-0.34

[2.3%][1.4%][1.5%][1.5%]《-13.3%》《-1.9%》

33.4

37.2

52.4

51.7

14.5

-0.71

[2.6%][2.6%][4.5%][4.5%]《+39.0%》《-1.4%》

13.4

30.3

46.9

46.1

15.8

-0.76

[1.1%][2.2%][4.0%][4.1%]《+52.1%》《-1.6%》

6.2

3.0

2.9

3.0

0.06

0.14

[0.5%][0.2%][0.2%][0.3%]《+2.1%》《+4.9%》13.8

2.3

2.2

2.1

-0.21

-0.10

[1.1%][0.2%][0.2%][0.2%]《-8.9%》《-4.6%》

0.0

1.5

0.3

0.3

-1.2

0.00

[0.0%][0.1%][0.0%][0.0%]《-77.6%》《+1.4%》(Unit: Mt-CO2 eq.)

Note: "0.0" are values less than 0.05.

Table 2 Energy-related CO2 emissions from each sector(after allocation of power and heat)
FY1990emissions[Share]FY2021emissions[Share]FY2013emissions[Share]FY2022Emissions[Share]Amount of change《Rate of change》

1,068

1,235987

964

Compared to Compared toFY2013
FY2021-271.3-23.0[100%][100%][100%][100%]《-22.0%》Industry

505

463

372

352

-111.0-19.7(factories, etc.)[47.3%][37.5%][37.7%][36.5%]《-24.0%》《-5.3%》

Total《-2.3%》

Transport

208

224

185

192

-32.4

+7.2

(cars, etc.)[19.5%][18.2%][18.7%][19.9%]《-14.5%》《+3.9%》

Commercial and other131

235

187

179

-55.3

-7.9

(commerce, service, office, etc.)[12.3%][19.0%][19.0%][18.6%]《-23.6%》《-4.2%》

Residential
Energy transformation
Power plants, oil refineries,etc.
Statistical discrepancy frompower and heat allocation

126

209

160

158

-51.4

-2.2

[11.8%][17.0%][16.2%][16.4%]《-24.5%》《-1.4%》

--

96.6

104

82.9

82.4

[9.0%][8.4%][8.4%][8.5%]

96.2

106

87.6

84.9

-21.3

-2.8

[9.0%][8.6%][8.9%][8.8%]《-20.1%》《-3.2%》--+0.4

-2.6

-4.7

-2.5

[0.0%][-0.2%][-0.5%][-0.3%]

Note: "0.0" are values less than 0.05.
"After allocation of power and heat" refers to the allocation of energy-related CO2 emissions frompower and heat generation to each sector based on the consumption of power and heat.

3(Unit: Mt)

Details of main increases/decreases as compared to emissions in FY2021
１）Energy-related CO2 emissions (after allocation of power and heat) Industry sector (factories, etc.): 19.7 Mt (5.3%) decrease
・ Energy consumption decreased owing to the reduced production of iron and steel.
 Transport sector (cars, etc.): 7.2 Mt (3.9%) increase
・ The amount of passenger traffic increased.
 Commercial and other sector (commerce, services, office, etc.): 7.9 Mt (4.2%) decrease・ Consumption of oil products and electricity decreased.
 Residential sector: 2.2 Mt (1.4%) decrease
・ Energy consumption decreased owing to a warmer winter with lower demands for heating.
 Energy transformation sector (power plants, oil refineries, etc.) (excluding statistical discrepancy
from power and heat allocation): 2.8 Mt (3.2%) decrease・ Emissions from commercial power generation decreased.
2）Emissions other than energy-related CO2 (CO2 eq.) CO2 emissions not related to energy: 4.0 Mt (5.2%) decrease・ Emissions from the Industrial Processes and Product Use sector decreased owing to reduced
cement production.
 Methane (CH4) emissions: 0.51 Mt (1.7%) decrease・ Emissions from the Agriculture sector (rice cultivation, etc.) decreased.
 Nitrous oxide (N2O) emissions: 0.34 Mt (1.9%) decrease・ Emissions from the Energy sector decreased.
 Hydrofluorocarbon (HFC) emissions: 0.8 Mt (1.6%) decrease・ Emissions from refrigerants decreased owing to the transition to refrigerants with lower GWPs
and an increase in HFC recovery during the disposal of commercial refrigeration and airconditioning.
 Perfluorocarbon (PFC) emissions: 0.14 Mt (4.9%) increase・ Emissions from solvents increased.
 Sulfur hexafluoride (SF6) emissions: 0.1 Mt (4.6%) decrease・ Emissions from metal production decreased.
 Nitrogen trifluoride (NF3) emissions: no significant change4