Suicasmo, CC BY-SA 4.0

Iōzan (Atosanupuri Sulfur Mountain)

硫黄山（アトサヌプリ）

Hokkaido · Hokkaido

An active volcanic vent field near Kawayu Onsen where visitors walk within meters of hissing, sulfur-yellow fumaroles; hard-boiled eggs cooked in the natural steam are sold on-site.

Crowd level: Moderate
Rating: 4.5· 747 reviews
Nearest station: Kawayu-Onsen Station (JR Senmō Main Line)
Website: masyuko.or.jp/enjoy/iouzan

How to get there

~20 min walk (1.6km) or short taxi from Kawayu-Onsen Station to the visitor center/vent field.

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