Japan is experiencing its greatest hardships since World War II as it tackles the aftermath of an earthquake, tsunami and a growing nuclear crisis, Prime Minister Naoto Kan says. In a televised statement, Mr Kan warned of sweeping power cuts to come.
He said the situation at the quake-hit Fukushima nuclear plant remained grave, a day after an explosion at a reactor.
Meanwhile, police have warned that the death toll in tsunami-hit Miyagi prefecture alone could exceed 10,000.
Millions of survivors remain without electricity and authorities are stepping up relief efforts as the scale of the tragedy becomes clearer.