Meanwhile, Japan Atomic Power shut down the 1, 100-megawatt Tokai Daini nuclear plant on the north-east coast, the closest to Tokyo.

BBC: Japan quake: Nuclear closures to cause power shortages

Seven boiling water reactors at the Fukushima Daiichi plant and the neighbouring Fukushima Daini plant, both operated by Tokyo Electric Power (Tepco), shut down on Friday.

BBC: Japan quake: Nuclear closures to cause power shortages

The Tokyo Electric Power Company (Tepco), which operates the damaged nuclear plant, announced that all six reactors at the Fukushima Daiichi plant, designed by General Electric, and all four, undamaged reactors at the Fukushima Daini plant have been shut off.

FORBES: Japan Will Struggle To Meet Electricity Demand