Adatara is a stratovolcano found about 15 km southeast of Fukushima city.
It is made up of three cones (Maegatake, Osoyozan and Adatara). These cones range from basaltic to andesitic in composition.
Adatara has had two historical eruptions.
Its last eruption was in 1990. Historical eruptions have been limited to Numano-daira crater.