TOKYO—A volcano on Japan’s major western island of Kyushu erupted on Monday morning, with authorities issuing their highest level alert of 5 for the mountain.
There have been no immediate reports of damage and some areas have been advised to evacuate.
Volcanic stones rained down at a distance of 2.5 km (1.5 miles) from the volcano, a JMA official said.
Nuclear regulators said Sunday there were no irregularities detected at the Sendai atomic plant, which lies about 50 km (31 miles) from the volcano.
Video footage showed what appeared to be a red mass flowing down one side of the volcano, with red projectiles shooting upwards.
Most of the city of Kagoshima is across the bay from the volcano but several residential areas within about 3 km (1.9 miles) of the crater may be ordered to evacuate depending on the situation, NHK said.
It later reported that 51 people in the vicinity were being evacuated.