A volcano in southern Japan has erupted for the first time in 250 years.

Authorities have now set up a no-go zone around the mountain.

The Meteorological Agency said on Friday that Mount Io erupted on Thursday for the first time since 1768, spewing smoke and ash high into the sky.

The volcano is part of the Kirishima mountain range on Japan's southern main island of Kyushu.

Mount Ioyama spews grayish smoke

The agency has expanded a no-go zone to the entire mountain from just around the volcano's crater.

Officials said explosions briefly subsided Friday, but cautioned residents in nearby towns against falling volcanic rock and ash.

Another volcano nearby also erupted violently in March for the first time in seven years.

Japan sits on the Pacific "Ring of Fire" and has 110 active volcanoes.