Japan volcano erupts sending plumes of ash kilometres into the sky

Video shared on social media shows the eruption of Sakurajima, a volcano in Japan's Kagoshima Prefecture.

A volcano in southern Japan has erupted for the second time in four months, sending huge plumes of ash billowing kilometres into the sky, the weather agency and local media reported.

Sakurajima, one of Japan’s most active volcanoes, erupted after noon on Saturday, sending ash soaring up to 3,400 metres, the Japan Meteorological Agency said.

It was the first major eruption since December 13, according to the Yomiuri Shimbun daily.

The eruption helped ease most of the crustal deformation that had been building up inside the volcano, the meteorological agency said.