Experts warn over tsunami risk
Revised estimates of the potential impact an offshore earthquake could have on Japan show that much of the country's Pacific coast could be inundated by a tsunami more than 65ft high.
According to Japanese media, a government-commissioned panel of experts said a tsunami unleashed by a magnitude-9.0 earthquake in the Nankai trough, which runs east of Japan's main island of Honshu to the southern island of Kyushu, could top 112ft at its highest point.
An earlier forecast in 2003 put the potential maximum height of such a tsunami at less than 66ft.
The revisions are based on new research following last March's magnitude-9.0 earthquake and tsunami, which devastated a long stretch of Japan's north-eastern coast.