Zao fumaroles

The Zao fumaroles are active sulfuric gas emissions in the crater of Mount Zao in northern Japan. Mount Zao is also known for its ski resort and winter ice-covered trees.

They emit sulfuric volcanic gases, which can be hazardous around active fumarole areas. Visitors should follow official access warnings because volcanic gas conditions can change.

Mount Zao is a popular ski destination in northern Japan. In winter it is especially famous for ice-clad trees, sometimes called snow monsters, formed by heavy snow and rime.

Yes. Fumaroles are openings where hot volcanic gases escape from the ground, so the Zao emissions reflect continuing geothermal and volcanic activity beneath Mount Zao.