World Map › Chokaisan
Volcano
Chokaisan
Stratovolcano · 2,236 m · Japan
Chokaisan sits on the Okhotsk Plate, in a subduction zone. 31 eruptions are known since the end of the last ice age, the most recent in 1974. Its major eruptions caused at least 8 deaths.
- Elevation
- 2,236 m
- Type
- Stratovolcano
- Tectonic Setting
- Subduction zone, continental crust
- Dominant Rock
- Andesite / Basaltic Andesite
- Plate
- Okhotsk Plate
- Country
- Japan
- Last Eruption
- 1974
- Known Eruptions (Holocene)
- 31
- Max. Explosivity (VEI)
- 3
- Known Fatalities
- 8
Nearby Cities
Cities of more than 20,000 people within 100 km. At least 100,000 people live in those within 30 km.
- 26 kmSakata100,000 people
- 48 kmTsuruoka100,000 people
- 68 kmAkita320,000 people
- 95 kmYamagata272,000 people
Eruption Timeline
Each bar is an eruption; its height shows its explosivity (VEI 0 to 8).
Eruption Deadly Eruption (NOAA) Uncertain Date
Sources : Global Volcanism Program, 2026. Volcanoes of the World (v. 5.4.0; 7 Aug 2026), Smithsonian Institution, doi:10.5479/si.GVP.VOTW5-2026.5.4 (volcano.si.edu) · NOAA NCEI · USGS · Wikidata