Mount Apoi

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Mount Apoi
Mount Apoi is located in Japan
Mount Apoi
Mount Apoi
Location of Mount Apoi in Japan.
Highest point
Elevation810.2 m (2,658 ft) [1]
Prominence130 m (430 ft) [1]
Parent peakPinneshiri (Hidaka)
ListingList of mountains and hills of Japan by height
Coordinates42°6′28″N 143°1′32″E / 42.10778°N 143.02556°E / 42.10778; 143.02556Coordinates: 42°6′28″N 143°1′32″E / 42.10778°N 143.02556°E / 42.10778; 143.02556[1]
LocationHokkaidō, Japan
Parent rangeHidaka Mountains
Topo mapGeospatial Information Authority of Japan (国土地理院, Kokudochiriin) 25000:1 アポイ岳, 50000:1 えりも
Mountain typeFold
Easiest routeHike

Mount Apoi (アポイ岳, Apoi-dake) is located in the Hidaka Mountains, Hokkaidō, Japan. It is near the town of Samani. It is well known for hosting a large number of plants that are found only on Hokkaidō, such as Callianthemum miyabeanum (ヒダカソウ, Hidaka-sō). The mountain is made from ultramafic rock of unknown age.[2]

Mt. Apoi Geopark[edit]

The Mt. Apoi Geopark (アポイ岳ジオパーク) is a geopark covering whole territory of Samani. The area was declared a Japanese Geopark in 2008, and a UNESCO Global Geopark in 2015. [3]

Flora & Fauna of Mt. Apoi[edit]

  • Ezo Japanese Pika
    • The Ezo Japanese Pika, a famous variety of pika, is a relict from the ice age. It grows to a size of 15 cm, is dark brown in color with rounded ears, and lets out a sharp, alarming cry. Even though the Ezo Japanese Pika lives in central Hokkaido within the alpine zone of the Hidaka mountains, their distribution in Southern Hidaka is universally limited to the southern area. It is also found at very low altitudes, 50 meters above sea level, around the rocky terrain of Mt. Apoi and the Horoman River.
  • Himechamadara Seseri
    • The Himechamadara Seseri (Seseri species) is a butterfly that grows to a length of about 2.5 cm, and is brown in color with small white speckles. This butterfly lives exclusively at Mt. Apoi and exists nowhere else in Japan. The larva eats the Kinrobai alpine flower and matures into an adult during May and June. This one month span is the only time it can be seen. It’s believed that the Himechamadara Seseri was widely distributed during the Ice Age but was left here at Mt. Apoi as the climate warmed.
  • Apoi Maimai
    • The Apoi Maimai is an endemic species of snail (recorded as a new species in 1970) that exists around Mt. Apoi and near the Horoman River. Related to the Takahide Maimai of the Hime Maimai genus that exists in Hokkaido, the Apoi Maimai can be found in the crevices around the peridotite rock. The shell of the Apoi Maimai only grows to a size of 1 cm wide, is dark brown in color, and sprouts thin stiff hairs on the surface of the shell.

See also[edit]


  1. ^ a b c Geospatial Information Authority map 25000:1 アポイ岳, last access 9 April 2008.
  2. ^ "Hokkaido". Seamless digital geological map of Japan 1: 200,000. Geological Survey of Japan, AIST. Dec 15, 2009. Retrieved 10 May 2010.
  3. ^ Official Website of Mt. Apoi Geopark (in English)
  • Shyun Umezawa, Yasuhiko Sugawara, and Jun Nakagawa, Hokkaidō Natsuyama Gaido 4: Hidaka Sanmyaku no Yamayama (北海道夏山ガイド4日高山脈の山やま), Sapporo, Hokkaidō Shimbunshya, 1991. ISBN 4-89363-605-7