Ōnohara Islands

Ōnohara-jima

Native name: 大野原島
Geography
Location	Izu Islands
Coordinates
Archipelago	Izu Islands
Area
Highest elevation	114 m (374 ft)
Country
Japan
Demographics
Population	0

Map of Miyake-jima showing Ōnohara-jima to the southwest

Aerial photo of Ōnohara-jima. Made based on National Land Image Information (Color Aerial Photographs), Ministry of Land, Infrastructure, Transport and Tourism

The Ōnohara Islands (大野原島, Ōnohara-jima) are a group of volcanic deserted islands located in the Philippine Sea approximately 180 kilometres (110 mi) south of Tokyo and 10 kilometres (6.2 mi) west of Miyake-jima, in the northern portion of the Izu archipelago, Japan. The group is also known as Sanbon-dake (三本岳, lit. “Three Peaks” ) from its profile.

Geography

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 114 metres (374 ft) on the main islet of Koyasu-shima (小安島).

Located in the Kuroshio Current, the area has abundant sea life, and is popular with sports fishermen and scuba divers.

See also

• Izu Islands

External links

• Quaternary Volcanoes in Japan
• Entry at Oceandots.com at the Wayback Machine (archived December 23, 2010)