Mount Oakan1,370 m

About Mount Oakan

Mount Oakan is a 1,370 m mountain in Kushiro City, Hokkaido. It lies within Akan-Mashu National Park. This volcano rises east of Lake Akan. It is one of the volcanoes that grew inside the Akan caldera after the caldera formed. From about 5,000 years ago it poured out lava many times, and summit eruptions ended by about 1,000 years ago. Mixed forest covers the slopes to about 1,000 m, with Siberian dwarf pine on the ridge above. The summit overlooks the caldera and its lakes.

Sources: GSI, Elevations of Major Mountains in Japan, MLIT, National Land Numerical Information: Natural Park Areas, Japan Meteorological Agency, Oakandake, Ministry of the Environment, Akan-Mashu National Park: Highlights (sources in Japanese)

Mountain data

Elevation

1,370 m#65 of 156 by height

Elevation basis

Triangulation pointGeospatial Information Authority of Japan, Elevations of Major Mountains in Japan (March 31, 2026)

Japanese name

雄阿寒岳（おあかんだけ）

Location

Kushiro City, Hokkaido

Area

Kushiro Nemuro

Natural park

Akan-Mashu National Park

Active volcano

Part of Oakandake

100 Famous Japanese Mountains

None

Hokkaido Hyakumeizan

Both editions (No. 38 in 2003)

The location lists the municipality of the summit and any others within 300 m of it (checked with the GSI reverse geocoder).

Themes that include Mount Oakan

• Hokkaido 100 Mountains
• Active volcanoes
• Akan-Mashu National Park