Japan vs Iran: population comparison
Current population of Japan
122,696,542
Live estimate, extrapolated from the latest official figures
- Births today
- 400
- Deaths today
- 935
- Change today (UTC)
- −346
Current population of Iran
93,360,283
Live estimate, extrapolated from the latest official figures
- Births today
- 662
- Deaths today
- 250
- Change today (UTC)
- +486
Japan has a population of 123,366,734 and Iran has 92,417,681 (2025 estimates). Japan is currently larger by 30,949,053 people — about 1.3 times Iran's population. They rank 12 and 17 in the world respectively.
Their trajectories differ: Iran grows at +0.92% per year versus −0.49% for Japan. One population is expanding while the other shrinks — the gap between them widens every year.
Beyond size, the structures differ: Iran is the younger society (median age 34.0 vs 49.8); Japan is far more crowded at 342 people per km² against 56.
Japan vs Iran population, 1960–2025
Side by side
| Indicator | Japan | Iran |
|---|---|---|
| Population | 123,366,734 | 92,417,681 |
| Annual growth | −0.49% | +0.92% |
| Yearly change | −608,637 | +849,943 |
| Density (P/km²) | 342 | 56 |
| Land area (km²) | 364,569 | 1,622,500 |
| Median age | 49.8 yrs | 34.0 yrs |
| Fertility rate | 1.15 | 1.68 |
| Life expectancy | 84.0 yrs | 77.9 yrs |
| Urban population | 92% | 77% |
| World share | 1.50% | 1.12% |
| 2050 projection (UN) | 105,123,167 | 101,861,993 |
Latest World Bank estimates; median age and 2050 projections from UN WPP 2024. Full profiles: Japan · Iran
Japan vs Iran FAQ
Is Japan bigger than Iran by population?
Japan currently has the larger population: 123,366,734 versus 92,417,681 (2025 estimates) — a gap of 30.95 million people.
Which grows faster, Japan or Iran?
Iran currently grows faster: +0.92% per year versus −0.49%.
How do Japan and Iran compare in 2050?
UN medium-variant projections put Japan at 105,123,167 and Iran at 101,861,993 in 2050.