# Mount Hokkaidō-Komagatake

- **Country:** Japan
- **Coordinates:** 42.063333, 140.677222
- **Age:** Quaternary
- **Topo:** Geographical Survey Institute 25000:1 駒ヶ岳50000:1 室蘭
- **Type:** stratovolcano
- **Listing:** List of mountains and hills of Japan by heightList of volcanoes in Japan
- **Language:** Japanese
- **Location:** Hokkaidō, Japan
- **Other Name:** 北海道駒ヶ岳
- **Elevation M:** 1131
- **Volcanic Arc:** Northeastern Japan Arc
- **Last Eruption:** September to November 2000
- **Label Position:** right

Occurrence of volcanic activity started some 30,000 years ago. Following roughly 5,000 years of dormancy, volcanic activity at Mount Koma-ga-take restarted in 1640. The 1640 eruption had an estimated volume of with a dense-rock equivalent of . It also contained a debris avalanche which caused a tsunami, resulting in over 700 deaths. Runup heights of > were recorded. Since then, there have been at least 50 recorded volcanic events at Mount Koma-ga-take.

![Photo of Mount Hokkaidō-Komagatake](https://upload.wikimedia.org/wikipedia/commons/4/4a/Mount_Hokkaido_Komagatake_in_winter_202601.jpg)

**Source:** https://en.wikipedia.org/wiki/Hokkaido_Koma-ga-take (Wikipedia, CC BY-SA)