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

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

Where does this data come from?

Statizoid (derived), published as Carbon dioxide (CO2) emissions from Industrial Combustion (Energy) (Mt CO2e), per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Hong Kong vs Japan: Carbon dioxide (CO2) emissions from Industrial Combustion (Energy)

Hong Kong

0.0004 Mt CO2e per square kilometre

in 2023

Japan

0.0004 Mt CO2e per square kilometre

in 2023

Hong Kong rank

12th

Japan rank

11th

Carbon dioxide (CO2) emissions from Industrial Combustion (Energy) over time

Hong Kong
Japan

How they compare

Japan currently reports 0.0004 Mt CO2e per square kilometre against 0.0004 Mt CO2e per square kilometre in Hong Kong, a difference of 0 Mt CO2e per square kilometre.

The two have swapped places 1 time across 54 shared years of data; in 1970 it was Hong Kong ahead.

Hong Kong ranks 12th and Japan ranks 11th of 193 countries.

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

Head to head by decade

Decade	Hong Kong	Japan	Difference	Ahead
1970s	0.0032 Mt CO2e per square kilometre	0.0007 Mt CO2e per square kilometre	0.0024 Mt CO2e per square kilometre	Hong Kong
1980s	0.0032 Mt CO2e per square kilometre	0.0006 Mt CO2e per square kilometre	0.0026 Mt CO2e per square kilometre	Hong Kong
1990s	0.0033 Mt CO2e per square kilometre	0.0007 Mt CO2e per square kilometre	0.0026 Mt CO2e per square kilometre	Hong Kong
2000s	0.0025 Mt CO2e per square kilometre	0.0006 Mt CO2e per square kilometre	0.0019 Mt CO2e per square kilometre	Hong Kong
2010s	0.002 Mt CO2e per square kilometre	0.0006 Mt CO2e per square kilometre	0.0014 Mt CO2e per square kilometre	Hong Kong
2020s	0.0005 Mt CO2e per square kilometre	0.0005 Mt CO2e per square kilometre	0 Mt CO2e per square kilometre	Hong Kong

Averages of every year both report within each decade.

Frequently asked questions

Which has higher carbon dioxide (co2) emissions from industrial combustion (energy), Hong Kong or Japan?: Japan, at 0.0004 Mt CO2e per square kilometre against 0.0004 Mt CO2e per square kilometre in Hong Kong as of 2023.
What is the difference in carbon dioxide (co2) emissions from industrial combustion (energy) between Hong Kong and Japan?: 0 Mt CO2e per square kilometre, with Japan ahead.
How many years of comparable data are there for Hong Kong and Japan?: 54 years are reported by both, from 1970 to 2023.
How do Hong Kong and Japan rank globally for carbon dioxide (co2) emissions from industrial combustion (energy)?: Hong Kong ranks 12th and Japan ranks 11th of 193 countries.
Where does this data come from?: Statizoid (derived), published as Carbon dioxide (CO2) emissions from Industrial Combustion (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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Hong Kong vs Japan: Carbon dioxide (CO2) emissions from Industrial Combustion (Energy). Statizoid, drawing on Statizoid (derived). Retrieved 22 September 2026, from https://environment.statizoid.com/compare/carbon-dioxide-co2-emissions-from-industrial-combustion-energy-mt-co2e-per-square/hong-kong-sar-china/japan/

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<a href="https://environment.statizoid.com/compare/carbon-dioxide-co2-emissions-from-industrial-combustion-energy-mt-co2e-per-square/hong-kong-sar-china/japan/">Hong Kong vs Japan: Carbon dioxide (CO2) emissions from Industrial Combustion (Energy)</a> — Statizoid

About this data

Indicator: Carbon dioxide (CO2) emissions from Industrial Combustion (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: 240 places, 12,327 data points, 1970–2023
Last refreshed: 20 September 2026

Carbon dioxide (CO2) emissions from Industrial Combustion (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.