Iwaki Population 2026
Iwaki has a population of 357,309, making it the #61 biggest city in 🇯🇵 Japan, located in Fukushima. Roughly 0.3% of Japan's population lives here. It is about 27× smaller than Tokyo, the country's biggest city.
Population (city proper)
357,309
Rank in Japan
#61
Coordinates
37.05°N, 140.88°E
~9 m elevation · Asia/Tokyo
Distance to capital (Tokyo)
185 km
115 miles, straight line
Other big cities in Fukushima
| City | Population | Rank in Japan |
|---|---|---|
| Kōriyama | 327,692 | #72 |
| Fukushima | 294,237 | #80 |
| Aizu-Wakamatsu | 118,159 | #226 |
| Sukagawa | 74,992 | #372 |
| Date | 59,625 | #471 |
| Shirakawa | 59,491 | #472 |
| Minami-Sōma | 59,005 | #475 |
| Nihommatsu | 53,557 | #518 |
Cities near Iwaki
FAQ
What is the population of Iwaki?
Iwaki has a population of 357,309 (city proper, latest official figure via GeoNames), making it the #61 biggest city in Japan.
What region is Iwaki in?
Iwaki is located in Fukushima, Japan.
Is Iwaki the capital of Japan?
No, the capital of Japan is Tokyo, about 185 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.