Mount Aso
Overview
 
is the largest active volcano
Volcano
2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...

 in 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...

, and is among the largest in the world. It stands in Aso Kujū National Park
Aso Kuju National Park
is a national park on the island of Kyūshū in Japan.-See also:*List of national parks of JapanIt is a very popular place for hikers. It has a famous volcano which has a cable car up the crater. It is an active volcano.-External links:...

 in Kumamoto Prefecture
Kumamoto Prefecture
is a prefecture of Japan located on Kyushu Island. The capital is the city of Kumamoto.- History :Historically the area was called Higo Province; and the province was renamed Kumamoto during the Meiji Restoration. The creation of prefectures was part of the abolition of the feudal system...

, on the island of Kyūshū
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....

. Its peak is 1592 m above sea level
Sea level
Mean sea level is a measure of the average height of the ocean's surface ; used as a standard in reckoning land elevation...

. Aso has one of the largest caldera
Caldera
A caldera is a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption, such as the one at Yellowstone National Park in the US. They are sometimes confused with volcanic craters...

 in the world (25 km north-south and 18 km east-west). The caldera has a circumference of around 120 km (74.6 mi), although sources vary on the exact distance.
The central cone group of Aso consists of five peaks: Mt.
 
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