# Mount Iō

- **Country:** Japan
- **Coordinates:** 44.133333, 145.161111
- **Topo:** Geospatial Information Authority, 25000:1 硫黄山50000:1 羅臼
- **Type:** Stratovolcano
- **Range:** Shiretoko Peninsula
- **Listing:** List of mountains in JapanList of volcanoes in Japan
- **Language:** Japanese
- **Location:** Hokkaidō, Japan
- **Other Name:** 硫黄山
- **Elevation M:** 1562.0
- **Parent Peak:** Mount Sashirui
- **Translation:** Sulphur Mountain
- **Prominence M:** 243
- **Volcanic Arc:** Kuril arc
- **Last Eruption:** 1936
- **Label Position:** left

The mountain was once mined for sulphur, hence its name. To the Ainu the mountain was known as Atosanupuri (naked mountain). The mountain is quite bare. Despite its bareness and being a rather low mountain at it hosts alpine plant life. It hosts colonies of Siberian Dwarf Pine, Rhododendron diversipilosum, and other members of Ericaceae.

![Photo of Mount Iō](https://upload.wikimedia.org/wikipedia/commons/c/ca/140828_Kamuiwakka_Falls_and_Mount_Io_Shiretoko_Hokkaido_Japan02sbs13.jpg)

**Source:** https://en.wikipedia.org/wiki/Mount_Iō_(Shiretoko) (Wikipedia, CC BY-SA)