Iran vs Japan: CO₂ emissions from transport
Iran
148.49 million tonnes
in 2023
Japan
186.34 million tonnes
in 2023
Iran rank
9th
Japan rank
6th
CO₂ emissions from transport over time
- Iran
- Japan
How they compare
Japan currently reports 186.34 million tonnes against 148.49 million tonnes in Iran, a difference of 37.85 million tonnes.
That makes Japan's figure about 1.3 times Iran's.
Across all 34 years both countries report, Japan has been ahead every year.
Iran ranks 9th and Japan ranks 6th of 191 countries.
Japan has averaged higher in every one of the 4 decades both report.
Head to head by decade
| Decade | Iran | Japan | Difference | Ahead |
|---|---|---|---|---|
| 1990s | 54.40 million tonnes | 243.05 million tonnes | 188.65 million tonnes | Japan |
| 2000s | 99.88 million tonnes | 250.64 million tonnes | 150.76 million tonnes | Japan |
| 2010s | 132.58 million tonnes | 213.50 million tonnes | 80.92 million tonnes | Japan |
| 2020s | 145.03 million tonnes | 184.07 million tonnes | 39.04 million tonnes | Japan |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher co₂ emissions from transport, Iran or Japan?
- Japan, at 186.34 million tonnes against 148.49 million tonnes in Iran as of 2023.
- What is the difference in co₂ emissions from transport between Iran and Japan?
- 37.85 million tonnes, with Japan ahead.
- How many years of comparable data are there for Iran and Japan?
- 34 years are reported by both, from 1990 to 2023.
- How do Iran and Japan rank globally for co₂ emissions from transport?
- Iran ranks 9th and Japan ranks 6th of 191 countries.
- Where does this data come from?
- Climate Watch (2026) – with major processing by Our World in Data, published as CO₂ emissions from transport. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Emissions are measured in tonnes.