Ōarai, Ibaraki
Ōarai 
    大洗町  | |
|---|---|
Ōarai town hall  | |
Location of Ōarai in Ibaraki Prefecture  | |
| Coordinates: 36°18′48″N 140°34′29.5″E / 36.31333°N 140.574861°E | |
| Country | Japan | 
| Region | Kantō | 
| Prefecture | Ibaraki | 
| District | Higashiibaraki | 
| Area | |
 • Total  | 23.74 km2 (9.17 sq mi) | 
| Population  (1 October 2020)  | |
 • Total  | 15,787 | 
| • Density | 660/km2 (1,700/sq mi) | 
| Time zone | UTC+9 (Japan Standard Time) | 
| – Tree | Pine | 
| – Flower | Azalea | 
| – Bird | Common gull | 
| Phone number | 029-288-3111 | 
| Address | 6881-275 Isohama-cho, Ōarai-machi, Higashiibaraki-gun, Ibaraki-ken 311–1392 | 
| Website | Official website | 
Ōarai (大洗町, Ōarai-machi) is a town located in Ibaraki Prefecture, Japan. As of 1 July 2020, the town had an estimated population of 15,867 in 6,881 households and a population density of 664 inhabitants per square kilometre (1,720/sq mi). The percentage of the population aged over 65 was 34.0%. The total area of the town is 23.89 square kilometres (9.22 sq mi). The Japan Atomic Energy Agency operates a research center in Ōarai with a number of nuclear research reactors, including the Jōyō and High-temperature engineering test reactor facilities.