is a stratovolcano

Stratovolcano

A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...

 in the Tokara Islands

Tokara Islands

The Tokara Islands is a group of islands in part of the Satsunan Islands, which is part of the Nansei Islands. The whole island group belongs to Toshima Village, Kagoshima Prefecture, Japan....

 of Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. It is the largest mountain on Nakanoshima

Nakanoshima

Nakanoshima is a 3 km long and 50 hectares narrow sandbank in Kita-ku, Osaka city, Japan, that divides the Kyū-Yodo River into the Tosabori and Dōjima rivers...

, which is part of Toshima

Toshima, Kagoshima

is a village located in Kagoshima District, Kagoshima, Japan. The village encompasses the whole Tokara Islands. The village office is located in Kagoshima City outside the village....

 in Kagoshima District

Kagoshima District, Kagoshima

Kagoshima is a district located in Kagoshima Prefecture. As of October 1, 2008, the district has an estimated Population of 1,087 and a Density of 8.19 persons/km². The total area is 132.71 km²....

 of Kagoshima Prefecture

Kagoshima Prefecture

is a prefecture of Japan located on the island of Kyushu. The capital is the city of Kagoshima.- Geography :Kagoshima Prefecture is located at the southwest tip of Kyushu and includes a chain of islands stretching further to the southwest for a few hundred kilometers...

. Being the largest mountain on a small island, it is also referred to as Nakanoshima.

The mountain is an andesitic volcano. The volcano had a minor mud eruption in January 1914. In October 1949 the summit crater produced an ash cloud. The rock of the mountain is non-alkali mafic rock produced in the last 18,000 years.

Sulphur mining took place on the southeast flank until 1944. During the rainy season, the summit crater fills with water.