, or Mount Kaimon, is an undissected

volcano A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are ...

– consisting of a basal stratovolcano and a small complex central lava dome – which rises to a height of 924 metres above sea level near the city of

Ibusuki is a city located in Kagoshima Prefecture, Japan, founded on April 1, 1954. In March 1, 2012, the city had an estimated population of 43,931, with 19,119 households and a population density of 294.82 persons per km2. However the census of 2020 con ...

in southern

Kyūshū is the third-largest island of Japan's five main islands and the most southerly of the four largest islands ( i.e. excluding Okinawa). In the past, it has been known as , and . The historical regional name referred to Kyushu and its surround ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. The last eruption occurred in the year 885 CE. Because of its conic shape, Mt. Kaimon is sometimes referred to as "the Fuji of

Satsuma Satsuma may refer to: * Satsuma (fruit), a citrus fruit * ''Satsuma'' (gastropod), a genus of land snails Places Japan * Satsuma, Kagoshima, a Japanese town * Satsuma District, Kagoshima, a district in Kagoshima Prefecture * Satsuma Domain, a sou ...

Geography

Mt. Kaimon is located in the south of

Kagoshima prefecture is a prefecture of Japan located on the island of Kyushu and the Ryukyu Islands. Kagoshima Prefecture has a population of 1,599,779 (1 January 2020) and has a geographic area of 9,187 km2 (3,547 sq mi). Kagoshima Prefecture borders Kumamoto P ...

Kyushu is the third-largest island of Japan's five main islands and the most southerly of the four largest islands ( i.e. excluding Okinawa). In the past, it has been known as , and . The historical regional name referred to Kyushu and its surroun ...

and is an important reference point for marine traffic because it is the southernmost prominence of the

Satsuma Peninsula The Satsuma Peninsula (薩摩半島 ''Satsuma-hantō'') is a peninsula which projects south from the southwest part of Kyūshū Island, Japan. To the west lies the East China Sea, while to the east it faces the Ōsumi Peninsula across Kagoshima ...

. This is one entrance marker to Kinko Bay (

Kagoshima Bay also known as Kinkō Bay, is a deep inlet of the East China Sea on the coast of Japan.''Merriam Webster's Geographical Dictionary, Third Edition'', p. 562. Kagoshima Bay is on the south coast of the island of Kyūshū. The port city of Kagoshi ...

) complimentary to the

Ōsumi Peninsula 261x261px, Satellite image of Ōsumi Peninsula The projects south from the Japanese island of Kyūshū and includes the southernmost point on the island, Cape Sata. Its east coast lies on the Pacific Ocean, while to the west it faces the Satsum ...

. Together with Mt. Noma and Mt. Kinpo, it is used by marine traffic.

Geology

Part of the Ibusuki volcanic field, Mt. Kaimon defines the eastern margin of the old

Ata Caldera , containing the Ata North Caldera, Mount Kaimon and Ikeda Caldera amongst other volcanos, is a massive, ill defined, mostly submerged volcanic caldera associated with the southern portions of Kagoshima Bay. Geology The earliest tephra assigned ...

. The total eruptive volume of

tephra Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. Once clasts have fallen to the ground, they rem ...

has been and of lava. There is a sea scarp which is 7.8km wide and 9.3km long, the shape is similar to a horseshoe in the seabed at the southern foot of the mountain. There is a lot of sediment at the foot of the mountain due to submarine landslides. It was found that there is a sea scarp underground on the south side of the mountain and it was caused by pressure from a submarine landslide before Mt. Kaimon was formed. The sedimentary layer of ejecta from the eruption at the end of the

7th century The 7th century is the period from 601 ( DCI) through 700 ( DCC) in accordance with the Julian calendar in the Common Era. The spread of Islam and the Muslim conquests began with the unification of Arabia by Muhammad starting in 622. After Muh ...

is called ao-kora (ao means blue and kora is soil consisting of volcanic ash found in the southern part of the Satsuma Peninsula). The sedimentary layer of ejecta by the eruption at the end of the

is called murasaki-kora (Murasaki means purple). These layers are a clue to know the changes in life in this era. It has become clear that a village was isolated by a large eruption with change in life style in the latter part of the

9th century The 9th century was a period from 801 ( DCCCI) through 900 ( CM) in accordance with the Julian calendar. The Carolingian Renaissance and the Viking raids occurred within this period. In the Middle East, the House of Wisdom was founded in Abbasid ...

Eruptive History

Mt. Kaimon began volcanic activity about 4000 years ago. From 3,000 years up to 885 years ago, large eruptions occurred 9 times and eruptions resulting in large amounts of lava occurred 10 times making twelve major eruptions to date. The two large eruptions in the historic written record are in 874 CE (Jogan era) and 885 CE (Nin-na era) The complex layered central dome consists of a scoria cone topped by lava flows and ultimately a lava dome which was penetrated by a plug. However the explosion crater at the top was last enlarged by the 885 CE eruption.

Transition of height

1895 Events January–March * January 5 – Dreyfus affair: French officer Alfred Dreyfus is stripped of his army rank, and sentenced to life imprisonment on Devil's Island. * January 12 – The National Trust for Places of Histor ...

, the official height of Mt. Kaimon was from a second triangulation point which was at the summit of the mountain, but this was updated to by the

Geospatial Information Authority of Japan The , or GSI, is the national institution responsible for surveying and mapping the national land of Japan. The former name of the organization from 1949 until March 2010 was Geographical Survey Institute; despite the rename, it retains the same ...

in July

2001 The September 11 attacks against the United States by Al-Qaeda, which Casualties of the September 11 attacks, killed 2,977 people and instigated the global war on terror, were a defining event of 2001. The United States led a Participants in ...

, because climbers pointed out that the height of the rocks on the top of the mountain were higher than the triangulation point.

Climbing

The spiral-shaped hiking trail climb of Mt. Kaimon takes about 3 hours. Mt. Kaimon is considerably lower than most of the mountains on the 100 famous Japanese Mountains list but as climbing starts from close to sea level there is an ascent of . Mt. Kaimon is a single peak but with summit rocky outcrops that allow views on all sides, such as

Lake Ikeda is a caldera lake located 40 km south of Kagoshima city; Kyūshū island, Japan. It is perhaps best known to tourists as the location of the purported sightings of a monster named Issie, and as the largest lake on Kyūshū island with a s ...

to the north and

the Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...

to the south.

Tourism

* Kaimon Sanroku Nature Park - The

Tokara horse The (also known as the Kagoshima horse) is a Japanese horse native to the Tokara Islands, a group of islands in Kagoshima Prefecture at the southwestern tip of the island of Kyushu. Its height is about . Its coat color is predominantly seal brow ...

, is breed at the base of the mountain. * Kaimon Sanroku Fureai Park - There are log houses as well as camp sites. * Hirasaki Shrine *

- It is said that a mystery creature “

Issie is a caldera lake located 40 km south of Kagoshima city; Kyūshū island, Japan. It is perhaps best known to tourists as the location of the purported sightings of a monster named Issie, and as the largest lake on Kyūshū island with a sur ...

” lives there. The

Canola Close-up of canola blooms Canola flower Rapeseed oil is one of the oldest known vegetable oils. There are both edible and industrial forms produced from rapeseed, the seed of several cultivars of the plant family Brassicaceae. Historically, i ...

flowering in January is very attractive. * Bohi Park - Memorial to those killed in the

Pacific War The Pacific War, sometimes called the Asia–Pacific War, was the theater of World War II that was fought in Asia, the Pacific Ocean, the Indian Ocean, and Oceania. It was geographically the largest theater of the war, including the vast ...

in Philippines.

References

External links

Kaimondake
- Japan Meteorological Agency * - Japan Meteorological Agency Ibusuki, Kagoshima Mountains of Kagoshima Prefecture Stratovolcanoes of Japan Volcanoes of Kagoshima Prefecture Volcanoes of Kyushu {{Kagoshima-geo-stub