Mount Mihara
Volcano Active volcanic crater on Izu Ōshima island
Dominating Izu Oshima, Mount Mihara is an accessible volcanic peak reached by ferry from Tokyo; day-trippers hike to its crater rim for broad sea views and a close look at volcanic geology.
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Mount Mihara is an active volcanic peak on Izu Ōshima, one of the Izu Islands administered by Tokyo Prefecture. The volcano features a prominent summit crater and is the island’s main geomorphological feature.
Hiking routes lead toward the crater rim and offer coastal and island views; the summit area includes fumarolic activity and recent lava deposits in places. The mountain has a history of periodic eruptions and is monitored for volcanic activity.
Izu Ōshima lies south of the Izu Peninsula and is reached by scheduled ferries and occasional flights from the Tokyo region; the island’s transport links and visitor services are oriented around access to the volcano and coastal attractions.
- Access and hazards: The volcano is a dominant landmark on Izu Ōshima and is reached by ferry or air services from the Tokyo region; volcanic activity and gas emissions can restrict access at times.
What to See #
- Summit crater: The summit contains a large crater rim and accessible viewpoints around the depression that attract hikers and visitors to Izu Oshima.
How to Get to Mount Mihara #
Regular ferries and high-speed boats run from Tokyo ports (such as Takeshiba and Tokyo-Wan) to Izu Oshima; the crossing time varies from about 45 minutes (high-speed) to several hours (ferry). Once on the island, local buses and taxis connect to the trailheads for Mihara.
Tips for Visiting Mount Mihara #
- From Tokyo, Ferries or local tour operators can arrange boat trips to Izu Oshima; check schedules in advance.
- Observe volcanic activity advisories-Mihara is an active volcano and access can be restricted.
- Bring windproof clothing; the island's exposed coastal ridges can be surprisingly cold.
Best Time to Visit Mount Mihara #
Most visitors come between spring and autumn for comfortable hiking and easy ferry connections from Tokyo.
Weather & Climate near Mount Mihara #
Mount Mihara's climate is classified as Humid Subtropical - Humid Subtropical climate with warm summers (peaking in August) and cold winters (coldest in February). Temperatures range from 0°C to 27°C. Heavy rainfall (2166 mm/year), wettest in September.
January
January is cold with highs of 9°C and lows of 0°C. Regular rainfall (81 mm), partly cloudy skies, and breezy conditions.
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February
February is the coolest month with highs of 9°C and lows of 0°C. Regular rainfall (100 mm), partly cloudy skies, and breezy conditions.
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March
March is cold with highs of 11°C and lows of 3°C. Significant rainfall (164 mm) and partly cloudy skies.
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April
April is cool with highs of 16°C and lows of 8°C. Significant rainfall (178 mm) and partly cloudy skies.
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May
May is cool with highs of 20°C and lows of 12°C. Significant rainfall (196 mm) and mostly overcast skies.
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June
June is mild with highs of 22°C and lows of 15°C. Heavy rain (268 mm) and mostly overcast skies.
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July
July is mild with muggy conditions (dew point 23°C). Significant rainfall (198 mm) and mostly overcast skies.
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August
August is the warmest month with stifling humidity (dew point 24°C). Heavy rain (253 mm) and partly cloudy skies.
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September
September is mild with highs of 24°C and lows of 17°C. The wettest month with heavy rain (274 mm) and partly cloudy skies.
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October
October is cool with highs of 20°C and lows of 12°C. Heavy rain (236 mm), partly cloudy skies, and breezy conditions.
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November
November is cool with highs of 16°C and lows of 8°C. Significant rainfall (142 mm) and partly cloudy skies.
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December
December is cold with highs of 12°C and lows of 3°C. Moderate rainfall (76 mm) and partly cloudy skies.
