is a mountain located in the

Hidaka Mountains The are a mountain range in southeastern Hokkaido, Japan. It runs from Mount Sahoro or Karikachi Pass in central Hokkaidō south, running into the sea at Cape Erimo. It consists of folded mountains that range from in height. Mount Poroshiri ...

Hokkaidō is the second-largest island of Japan and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by railway via the Seikan Tunnel. The ...

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

. The mountain is made from

ultramafic rock Ultramafic rocks (also referred to as ultrabasic rocks, although the terms are not wholly equivalent) are igneous and meta-igneous rocks with a very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are usua ...

of unknown age.

References

* 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 is a Cities designated by government ordinance of Japan, designated city in Hokkaido, Japan. Located in the southwest of Hokkaido, it lies within the alluvial fan of the Toyohira River, a tributary of the Ishikari River. Sapporo is the capital ...

, Hokkaidō Shimbunshya, 1991. Pinneshiri {{Hokkaido-geo-stub