is a mountain in Tsubetsu,

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 ...

. It is the source of the

Abashiri River is a Class A river in Hokkaido, Japan. Etymology The name Abashiri is theorised to come from the Ainu words ''a-pa-siri'' (lit. "we found land") or ''apa-siri'' ("land of entrance"). History Around 1,000 years ago, the Okhotsk culture settl ...

. The mountain is made up of non-alkaline

mafic A mafic mineral or rock is a silicate mineral or igneous rock rich in magnesium and iron. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks include ...

volcanic rock that is 1.7 million to 7 million years old. N₃(102) per legend; located just northwest of Mt. Oakan (1370m). Map shows 978m elevation.

References

Ahoro {{Hokkaido-geo-stub