Tepco boss resigns amid huge losses
20 May 2011 Last updated at 13:13 BST
The president of Tepco, which operates Japan's crippled Fukushima nuclear power plant, has resigned as the firm reported an annual loss of more than $15bn -- one of the biggest ever by a Japanese company.
The losses are linked to the earthquake and tsunami that hit Japan in March and severely damaged the nuclear power plant.
Roland Buerk has more from Tokyo.