How many years of comparable data are there for Japan and Portugal?

54 years are reported by both, from 1970 to 2023.

Where does this data come from?

Statizoid (derived), published as Methane (CH4) emissions from Fugitive Emissions (Energy) (Mt CO2e), per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Japan vs Portugal: Methane (CH4) emissions from Fugitive Emissions (Energy) (Mt CO2e)

Japan

0 Mt CO2e per square kilometre

in 2023

Portugal

0 Mt CO2e per square kilometre

in 2023

Japan rank

93rd

Portugal rank

94th

Methane (CH4) emissions from Fugitive Emissions (Energy) (Mt CO2e) over time

Japan
Portugal

How they compare

Japan currently reports 0 Mt CO2e per square kilometre against 0 Mt CO2e per square kilometre in Portugal, a difference of 0 Mt CO2e per square kilometre.

Across all 54 years both countries report, Japan has been ahead every year.

Japan ranks 93rd and Portugal ranks 94th of 192 countries.

Japan has averaged higher in every one of the 6 decades both report.

Head to head by decade

Decade	Japan	Portugal	Difference	Ahead
1970s	0.0001 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0.0001 Mt CO2e per square kilometre	Japan
1980s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Japan
1990s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Japan
2000s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Japan
2010s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Japan
2020s	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Japan

Averages of every year both report within each decade.

Frequently asked questions

Which has higher methane (ch4) emissions from fugitive emissions (energy) (mt co2e), Japan or Portugal?: Japan, at 0 Mt CO2e per square kilometre against 0 Mt CO2e per square kilometre in Portugal as of 2023.
What is the difference in methane (ch4) emissions from fugitive emissions (energy) (mt co2e) between Japan and Portugal?: 0 Mt CO2e per square kilometre, with Japan ahead.
How many years of comparable data are there for Japan and Portugal?: 54 years are reported by both, from 1970 to 2023.
How do Japan and Portugal rank globally for methane (ch4) emissions from fugitive emissions (energy) (mt co2e)?: Japan ranks 93rd and Portugal ranks 94th of 192 countries.
Where does this data come from?: Statizoid (derived), published as Methane (CH4) emissions from Fugitive Emissions (Energy) (Mt CO2e), per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Japan vs Portugal: Methane (CH4) emissions from Fugitive Emissions (Energy) (Mt CO2e). Statizoid, drawing on Statizoid (derived). Retrieved 22 September 2026, from https://environment.statizoid.com/compare/methane-ch4-emissions-from-fugitive-emissions-energy-mt-co2e-per-square-kilometre/japan/portugal/

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<a href="https://environment.statizoid.com/compare/methane-ch4-emissions-from-fugitive-emissions-energy-mt-co2e-per-square-kilometre/japan/portugal/">Japan vs Portugal: Methane (CH4) emissions from Fugitive Emissions (Energy) (Mt CO2e)</a> — Statizoid

About this data

Indicator: Methane (CH4) emissions from Fugitive Emissions (Energy) (Mt CO2e), per square kilometre
Unit: Mt CO2e per square kilometre
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 239 places, 12,273 data points, 1970–2023
Last refreshed: 22 September 2026

Methane (CH4) emissions from Fugitive Emissions (Energy) (Mt CO2e) divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.