Fugendake, part of the <a href="https://en.wikipedia.org/wiki/Mount_Unzen" id="mwATQ" rel="mw:WikiLink" title="Mount Unzen">Mount Unzen</a> volcanic complex, <a href="https://en.wikipedia.org/wiki/Nagasaki_Prefecture" id="mwATU" rel="mw:WikiLink" title="Nagasaki Prefecture">Nagasaki Prefecture</a>, Japan, becomes active again and erupts.