I think they must conserve electricity due to Fukishima.
I watch the Japanese English-language channel a good bit. Everyone within the range of the Fukishima plant is on three-quarter usage....even at factories and plants. If you live outside of this region...you might have trimmed your usage by ten percent....just to show you are helping.
The truth is...Japan built itself throughout the last three decades on a very marginal and limited electrical generation plan. I doubt if they go into a regular lifestyle for at least another five years.