Volcano
Mount Asama: 2 Live Cameras in Japan
An active volcano on the Gunma–Nagano border, on two cameras: a monitoring camera and a scenery camera from Tsumagoi. The long skirt and the summit vents, at two distances.
What you can see
Asama is an active volcano well inland in the Kanto region, still venting from the summit. Lava from the great Tenmei eruption of 1783 is still there on the northern foot as the Onioshidashi lava field.
The Meteorological Agency camera exists to watch the crater, so it frames tight on the mountain. Mount Asama from Tsumagoi is the Environment Ministry's scenery camera, set back far enough to take in the whole gentle skirt. Use the second for the shape of the mountain, the first to check whether it is venting.
Asama does not throw up a plume the way Sakurajima does. It is usually a thin haze drifting slowly off the summit area — easy to see as white on a cold morning, and lost against the sky in the middle of the day.
Cameras you can watch now: 2
All 2 are still images. Tap one to open it in the camera list.
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Sample August 2026
Mount Asama
Gunma / Nagano border · Volcano
One of the most frequently erupting volcanoes in Japan. Around the camera at Onioshi, lava from the 1783 eruption is still lying where it stopped.
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Sample August 2026
Mount Asama from Tsumagoi
Tsumagoi, Gunma · Volcano
An active volcano with long, gentle flanks. The plume and the snow near the summit tell you both the season and how active it is.
When to watch
Winter mornings are the most reliable. Asama does not take especially deep snow, but what settles leaves streaks along the slope that make the shape of the ground easy to read. The air is dry too, so the outline holds even from a distance.
For the vents, come when it is coldest — around dawn. The same volume of water vapour condenses whiter the colder it is, and thins away to nothing once the sun is up.
Summer afternoons build thunderclouds, and the mountain can vanish entirely. From mid to late October the deciduous trees on the lower slopes turn and the colour of the whole frame changes.
Where Mount Asama is
Agencies publishing the cameras on this page
- Japan Meteorological Agency — volcano surveillance cameras (PDL 1.0) — Official site
- Ministry of the Environment — Internet Nature Institute (PDL 1.0) — Official site
The footage belongs to each agency. This site is an unofficial guide, and each sample frame was copied once per camera under that agency's terms of use.