Ōarai Population 2026
Ōarai has a population of 15,787, making it the #1183 biggest city in 🇯🇵 Japan, located in Ibaraki. It is about 617× smaller than Tokyo, the country's biggest city.
Population (city proper)
15,787
Rank in Japan
#1183
Coordinates
36.31°N, 140.58°E
~22 m elevation · Asia/Tokyo
Distance to capital (Tokyo)
106 km
66 miles, straight line
Other big cities in Ibaraki
Cities near Ōarai
- Katsuta155,968 people · ~9 km away
- Hitachi-Naka156,581 people · ~10 km away
- Mito270,685 people · ~13 km away
- Inada53,502 people · ~15 km away
- Okunoya34,627 people · ~15 km away
- Funaishikawa35,318 people · ~17 km away
FAQ
What is the population of Ōarai?
Ōarai has a population of 15,787 (city proper, latest official figure via GeoNames), making it the #1183 biggest city in Japan.
What region is Ōarai in?
Ōarai is located in Ibaraki, Japan.
Is Ōarai the capital of Japan?
No, the capital of Japan is Tokyo, about 106 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.