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Our guide
Mount Sanbe in Ōda, Shimane, is an active stratovolcano. Its highest peak, Osanbe, is 1,126 m, and at its centre is a caldera about 1 km across. Activity is believed to have begun about 100,000 years ago, and the volcano has often erupted explosively — mostly during the Pleistocene, but once in the Holocene, about 3,700 years ago at the Taiheizan lava dome, when pyroclastic flows ran down the northeastern and southeastern flanks as far as the Hayamizu River. Later eruptions have occurred but are not precisely dated.
We have not checked trails or a public-transport route, so check local information and the weather before you go.
Written by japan-spots.com (2026-09-22) from the sources credited on this page. Distances are straight lines between map positions.
Photos
Photos from Wikimedia Commons, each under its own licence — see credits
- Sanbe201402 — メルビル · CC BY-SA 4.0 · source · resized
- 山頂付近 — Koda6029 · CC BY-SA 4.0 · source · resized
- 山頂から見た薗の長濱 — Koda6029 · CC BY-SA 4.0 · source · resized
- 三瓶山山頂一等三角点 — Sankakutentanbou · CC BY-SA 4.0 · source · resized
- Sanbe＿ranch — メルビル · CC BY-SA 4.0 · source · resized
- Sanbe sadame2014 — メルビル · CC BY-SA 4.0 · source · resized
- Sanbe201508 — メルビル · CC BY-SA 4.0 · source · resized
- Sanbe-panorama2015 — メルビル · CC BY-SA 4.0 · source · resized
- Mt sanbe sourth — メルビル · CC BY-SA 4.0 · source · resized
- From-mt-mesanbe2015-02 — メルビル · CC BY-SA 4.0 · source · resized
What this place is
Mount Sanbe, also known as Sanbesan, is an active stratovolcano in Ōda, Shimane Prefecture. The highest peak, Osanbe, has an elevation of 1,126 m (3,694 ft). At the center of the volcano is a caldera 1 km (0.62 mi) across. The volcano's composition is mainly dacite and andesite. Volcanic activity was believed to have started 100 thousand years ago. The volcano frequently produces explosive eruptions with several classified as Plinian eruptions. All of these explosive eruptions occurred during the Pleistocene while one occurred in the Holocene at the Taiheizan lava dome approximately 3,700 years ago. The Holocene eruption triggered pyroclastic flows down the northeastern and southeastern flanks, reaching the Hayamizu River in the south. More recent eruptions have taken place but they are not precisely dated.
Background text from Wikipedia (CC BY-SA 4.0)
What to expect at this type of place: Mountain
Getting there
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