JMA reported that a very small eruptive event was recorded at Minamidake Crater (at Aira Caldera?s Sakurajima volcano) during 9-13 May.
An eruptive event at 1141 on 15 May generated a plume that rose 1.2 km above the crater rim.
The Alert Level remained at 3 (on a 5-level scale), and residents were warned to stay 2 km away from the crater.
Source: Japan Meteorological Agency (JMA)