Atosa Nupuri
アトサヌプリ
An active volcano in Hokkaido featuring over 1,500 steaming fumaroles and a landscape shaped by historic sulfur mining.
What it is
- An active quaternary volcano standing 512 meters above sea level in Teshikaga.
- Known as Mount Io or Atosa Nupuri, meaning naked mountain in the Ainu language.
- A designated active volcano within the Kutcharo Caldera with a history of sulfur mining.
- The primary water source for the nearby Kawayu Onsen hot spring area.
What to see
- Over 1,500 active fumaroles emitting volcanic gases across the mountain surface.
- Acidic soil conditions that prevent typical vegetation from growing on the slopes.
- The Mount Io Nature Hall which serves as the local visitor center.
- Guided climbing routes required for visitors wishing to ascend the mountain since 2020.
Notes written by Japan Gems from facts in Japanese Wikipedia.
Where it is
Atosa Nupuri Open in Google Maps
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