| Ōnohara-jima | |
| Native Name: | 大野原島 |
| Location: | Izu Islands |
| Archipelago: | Izu Islands |
| Area Km2: | 0.2 |
| Elevation M: | 114 |
| Country: | Japan |
| Country Admin Divisions Title: | Prefecture |
| Country Admin Divisions: | Tokyo |
| Country Admin Divisions Title 1: | Subprefecture |
| Country Admin Divisions 1: | Miyake Subprefecture |
| Country Admin Divisions Title 2: | Village |
| Country Admin Divisions 2: | Miyake |
| Population: | 0 |
The are a group of volcanic deserted islands located in the Philippine Sea approximately 180km (110miles) south of Tokyo and 10km (10miles) west of Miyake-jima, in the northern portion of the Izu archipelago, Japan. The group is also known as from its profile.
Ōnohara-jima consists of nine main islets and several smaller rocks and stacks. The island is the remnant of an andesite lava dome with sheer sides, the only visible portion of a submarine volcanic caldera. The above sea-level portion has a surface area of approximately 0.2 square kilometers, with a summit height of 114m (374feet) on the main islet of .
Located in the Kuroshio Current, the area has abundant sea life, and is popular with sports fishermen and scuba divers.
During the Korean War, aircraft of the US Air Force used Ōnohara-jima as a bombing range, endangering the Japanese murrelet, a rare seabird. The bombing was stopped after Jack Moyer wrote a letter to an associate of then-US President Harry S. Truman.[1] [2] [3]