Iwakuni Population 2026
Iwakuni has a population of 129,125, making it the #208 biggest city in 🇯🇵 Japan, located in Yamaguchi. Roughly 0.1% of Japan's population lives here. It is about 75× smaller than Tokyo, the country's biggest city.
Population (city proper)
129,125
Rank in Japan
#208
Coordinates
34.16°N, 132.22°E
~4 m elevation · Asia/Tokyo
Distance to capital (Tokyo)
702 km
436 miles, straight line
Other big cities in Yamaguchi
| City | Population | Rank in Japan |
|---|---|---|
| Shimonoseki | 265,684 | #91 |
| Yamaguchi | 193,966 | #126 |
| Ube | 173,733 | #142 |
| Shūnan | 149,632 | #171 |
| Hōfu | 116,925 | #232 |
| Tokuyama | 101,133 | #269 |
| Sanyōonoda | 60,326 | #462 |
| Kudamatsu | 55,887 | #501 |
Cities near Iwakuni
FAQ
What is the population of Iwakuni?
Iwakuni has a population of 129,125 (city proper, latest official figure via GeoNames), making it the #208 biggest city in Japan.
What region is Iwakuni in?
Iwakuni is located in Yamaguchi, Japan.
Is Iwakuni the capital of Japan?
No, the capital of Japan is Tokyo, about 702 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.