Mount Oakan
Mountain Active volcano in Hokkaido with crater lakes
A volcanic cone in eastern Hokkaido, Mount Oakan sits near Akan National Park and draws day‑hikers for lake views, crater rims and summer alpine flora.
Mount Oakan is a stratovolcano in eastern Hokkaido, Japan, reaching roughly 1,370 metres and forming part of the Akan volcanic complex.
Hikers use marked trails to reach the crater area and summit ridges; the mountain overlooks Lake Akan and is a distinct feature of the surrounding national park landscape.
The edifice is volcanic in origin and has shaped local topography within the Akan volcanic zone.
It is located in eastern Hokkaido inside Akan Mashu National Park, near the Lake Akan district and the town of Akan.
- Elevation and volcano group: Rises to about 1,370 metres and forms part of the Akan volcanic complex in eastern Hokkaido.
- Access and recreation: Located close to Lake Akan, it is accessed from Akan Mashu National Park and offers marked hiking routes to the crater area in summer and autumn.
How to Get to Mount Oakan #
Access from towns around Akan Mashu National Park; local buses and park services provide seasonal access to trailheads. Check regional transport schedules.
Tips for Visiting Mount Oakan #
- Oakan's alpine terrain is subject to heavy winter snow - plan summer hikes for safer conditions.
- Check local Hokkaido trail reports and bear advisories; carry bear spray where recommended.
- Combine with visits to Akan National Park for a full regional experience.
Best Time to Visit Mount Oakan #
Best in summer for hiking and in autumn for foliage; winter requires snow travel skills.
Weather & Climate near Mount Oakan #
Mount Oakan's climate is classified as Warm-Summer Continental - Warm-Summer Continental climate with mild summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -17°C to 18°C. Abundant rainfall (1317 mm/year), wettest in September.
January
January is the coldest month with highs of -8°C and lows of -16°C. Moderate rainfall (68 mm) and partly cloudy skies.
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February
February is the coldest month with highs of -8°C and lows of -17°C. Moderate rainfall (57 mm) and partly cloudy skies.
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March
March is freezing with highs of -4°C and lows of -12°C. Regular rainfall (99 mm) and mostly overcast skies.
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April
April is freezing with highs of 3°C and lows of -4°C. Regular rainfall (94 mm) and mostly overcast skies.
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May
May is cold with highs of 9°C and lows of 1°C. Significant rainfall (114 mm) and mostly overcast skies.
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June
June is cold with highs of 13°C and lows of 6°C. Significant rainfall (101 mm) and mostly overcast skies.
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July
July is cool with highs of 17°C and lows of 11°C. Significant rainfall (120 mm) and mostly overcast skies.
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August
August is cool with highs of 18°C and lows of 12°C. Significant rainfall (163 mm) and mostly overcast skies.
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September
September is cool with highs of 14°C and lows of 8°C. The wettest month with heavy rain (181 mm) and mostly overcast skies.
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October
October is cold with highs of 9°C and lows of 1°C. Significant rainfall (134 mm) and partly cloudy skies.
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November
November is freezing with highs of 2°C and lows of -5°C. Significant rainfall (113 mm) and partly cloudy skies.
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December
December is freezing with highs of -4°C and lows of -12°C. Moderate rainfall (73 mm) and partly cloudy skies.
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