Last updated: December 21, 2020
Walk through a landscape of hardened lava
This otherworldly landscape of black, craggy rocks was created from molten lava when Mt. Asama erupted in 1783. Local legend says the eruption was so powerful that it blocked out the sun for days.
Mt. Asama Magma Stone Park, or Onioshidashi Park, is a permanent reminder of the eruption's impact. At the center of the park is Asamayama Kannondo Temple, built in 1958 to remember those who died in the disaster. People pray here to ward off bad luck.
Walk among the rocks to see over 100 species of alpine plants that grow there and catch views of Mt. Asama, one of Japan's most active volcanoes.
Kanbara, Tsumagoi, Agatsuma District (Map)
About 40 minutes from Manza-Kazawaguchi Station
About 45 minutes by car from Usui-Karuizawa IC of Joshin-Etsu Expressway
About 50 minutes by car from Komoro IC of Joshin-Etsu Expressway
Free, 750 cars
8:00 a.m. to 5:00 p.m.
650 yen (450 yen for children)
Get inspired by stories about rural getaways, hiking adventures, onsen hopping, and local cuisine. Find out more about the unique charm of Gunma in our comprehensive articles, guides, and itineraries.Read more