, also referred to as , is the second highest 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...

 at 3067 m (10,062 ft) located around 100 km (62 mi) northeast of Nagoya. It is on the borders of Kiso

Kiso, Nagano (town)

is a town located in Kiso District, Nagano Prefecture, Japan.The town was founded on November 1, 2005, when the town of Kisofukushima was merged with three villages , all from Kiso District....

 and Ōtaki

Otaki, Nagano

is a village located in Kiso District, Nagano, Japan.- History :* 1504: There remains a record of Ōtaki being established at this time as part of the Chikuma Region of Shinano* 1868: Takigoshi Village is incorporated as part of Ōtaki....

, Nagano Prefecture

Nagano Prefecture

is a prefecture of Japan located in the Chūbu region of the island of Honshū. The capital is the city of Nagano.- History :Nagano was formerly known as the province of Shinano...

, and Gero

Gero, Gifu

is a city in Gifu Prefecture, Japan. The city is famous for its hot springs. The Hida River runs throughout the city.-History:The city was established on March 1, 2004 by the merger of the towns of Gero, Hagiwara, Kanayama and Osaka, and the village of Maze, all from Mashita...

, Gifu Prefecture

Gifu Prefecture

is a prefecture located in the Chūbu region of central Japan. Its capital is the city of Gifu.Located in the center of Japan, it has long played an important part as the crossroads of Japan, connecting the east to the west through such routes as the Nakasendō...

. It should not be confused with Mount Mitake

Mount Mitake

is a mountain in the Chichibu Tama Kai National Park near Tokyo, Japan. It stands tall. On the mountain is a Shinto shrine.It is one of the many highlights of the Chichibu Tama Kai National Park, which covers more than of forested mountains, hills, gorges and some rural towns in the prefectures...

, a mountain in Tokyo

Tokyo

, ; officially , is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family...

 written with the same characters, and various other Japanese mountains which share the name Ontake.

Thought to be inactive until 1979, it underwent a series of eruptions over the following year, but has not erupted since 1980.

The volcano has five crater lake

Crater lake

A crater lake is a lake that forms in a volcanic crater or caldera, such as a maar; less commonly and with lower association to the term a lake may form in an impact crater caused by a meteorite. Sometimes lakes which form inside calderas are called caldera lakes, but often this distinction is not...

s, with at 2905 m (9,531 ft) being the highest mountain lake in Japan.

A small pond located near the base of Mount Ontake contains a number of koi

Koi

or more specifically , are ornamental varieties of domesticated common carp that are kept for decorative purposes in outdoor koi ponds or water gardens....

 that have achieved seemingly impossible life spans. The oldest known vertebrate animal known to recorded history was a koi named "Hanako," who died here in 1977, at the age of 226 years—outlasting the world's oldest tortoise by 38 years..

See also

• List of mountains in Japan
• 100 Famous Japanese Mountains
• Three-thousanders (in Japan)
  Three-thousanders (in Japan)
  The following is a list of the 21 mountains in Japan whose altitudes are 3,000 metres or greater. The tallest mountain in Japan is Mount Fuji .- Geography :There are three-thousanders in the following regions:...
  
  
• List of volcanoes in Japan

External links

• In the Pines: English-language blog about Otaki Village, one of the entrances to Mount Ontake.