JMA reported that vigorous fumarolic activity on the S side of Iwo-yama (also called Ioyama), on the NW flank of the Karakuni-dake stratovolcano in the Kirishimayama volcano group, continued during 30 November-3 December.
Fumarolic plumes rose 100 m above the vent, and hot mud was ejected from the vent.
A hot pool of water persisted on the S side of the area.
Fumarolic plumes rose 50 m above a vent 500 m W of Iwo-yama.
The Alert Level remained at 2 (the second lowest level on a scale of 1-5).
Source: Japan Meteorological Agency (JMA)