Mount Eniwa - Eniwa Dake

A troide-shaped volcano that erupted on the north shore of Lake Shikotsu in southwest Hokkaido. It is 1,320 meters above sea level. After the formation of the Shikotsu caldera, volcanic eruptions erupted on the caldera walls in the early Holocene (Alluvial Epoch), changing the circular lake shoreline into a cocoon shape. Mount Izari, Mount Eniwa, Mount Fuppushi, and Mount Tarumae are lined up in a straight line, suggesting a weak line in the earth's crust. A fissure runs from the summit crater to the lake, and smoke rises from it. The entire mountain is covered in forest and has maintained its beautiful greenery, but in 1972 (Showa 47) it was used as the main venue for the downhill course for the Sapporo Olympics, and some of the forest was cut down. Lake Okotanpe, a dammed lake, is located at the northwest foot of the mountain, and Okotan Onsen and Marukoma Onsen are located on the lakeshore. There is a hiking trail that takes 5 hours round trip from Polovinai, located between Sapporo and Lake Shikotsu.

[Narabe Osamu]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

北海道南西部、支笏(しこつ)湖の北岸に噴出したトロイデ型の火山。標高1320メートル。支笏カルデラ形成後、完新世（沖積世）初期にカルデラ壁に噴出し、円形の湖岸線を繭型に変えた。漁(いざり)岳、恵庭岳、風不死(ふっぷし)岳、樽前(たるまえ)山が一直線上に並び、地殻の弱線を予想させる。頂上火口から湖上まで裂け目が走り、噴煙が立ち上っている。全山森林に覆われ美しい緑が保持されているが、1972年（昭和47）札幌オリンピックで、滑降コースの主会場になり、森林の一部が伐採された。北西麓(ろく)に堰止湖(せきとめこ)のオコタンペ湖があり、湖岸にオコタン温泉、丸駒温泉(まるこまおんせん)がある。札幌―支笏湖間にあるポロビナイから往復5時間の登山道がある。

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