Tokyo Electric Power says it will ration electricity with rolling blackouts in parts of Tokyo and other Japanese other cities.
The planned blackouts of about three hours each will start Monday. They are meant to help make up for a severe shortfall after key nuclear plants were left inoperable due to the earthquake and tsunami in northeastern Japan.
Trade Minister Banri Kaieda said Sunday that the power utility expects a 25 percent shortfall in capacity. Officials appealed to Japanese for their understanding and support, saying it was the worst crisis the nation has faced since World War II.