Mt. Iou (atusa-nupuri)
Mt. Iou (atusa-nupuri)
Mt. Iou (atusa-nupuri)
Mt. Iou (atusa-nupuri)
Mt. Iou (atusa-nupuri)
Mt. Iou (atusa-nupuri) Mt. Iou (atusa-nupuri) Mt. Iou (atusa-nupuri) Mt. Iou (atusa-nupuri) Mt. Iou (atusa-nupuri)


Mt. Iou is a 512-meter-high active volcano. It is rich in sulfur, a high-quality mining resource. The Meiji era (1868-1912) attracted attention as a raw material for matches, gunpowder, and trading with foreign countries to earn foreign currency. At the foot of Mt. Iou, lumps of sulfur have turned into yellowish crystals, and steam spews out of the ground. The smoke was so hot it could melt the shoes, and be careful not to touch them. Despite the harsh environment, the Ezo azalea blooms beautifully in June and July, and guided walks are held early in the morning every year during the season.

  • Address

    Teshikaga cho, Kawakami-gun, Hokkaido 088-3200

    Local map

  • Entry fee


  • Opening Hours


  • Closed


  • Website


  • Best Season

    All year

  • Point

    There is a paid parking lot for about 100 cars. The smell of sulfur is strong in some places, so bring a handkerchief or towel to cover your nose.

  • Nearest Station/IC Access

    About 1 hour and 10 minutes by car from Nemuro Nakashibetsu Airport

    From JR Kawayu-onsen Station, take the Kussharo Bus for about 5 minutes

Spot location

Open larger map

Other spots near Mt. Iou (atusa-nupuri)Within 50 km

Open map


See all Latest articles

See all

This month's top destinations

Recommended destinations (Jan. to Feb.)

Introduction of Japan's national parks