Production has been halted at many factories in Japan, as companies assess the damage of the earthquake and tsunami on the north-east coast.
Sony, Toyota, Nissan and Honda are among firms to have closed plants.
Economists say the earthquake and tsunami could have a "profound" impact on Japan's economy - the world's third largest - although it is too early to make any judgements.
Sony, Toyota, Nissan and Honda are among firms to have closed plants.
Economists say the earthquake and tsunami could have a "profound" impact on Japan's economy - the world's third largest - although it is too early to make any judgements.
