Corporate Information

Press Release (Mar 13,2011)
Implementation of rolling blackout and request for further energy saving
Due to the Tohoku-Chihou-Taiheiyo-Oki Earthquake occurred on March 11, 
our power supply facilities including Fukushima Daiichi Nuclear Power 
Station, Fukushima Daini Nuclear Power Station, and our transmission 
facilities are severely damaged. As such, the power supply-demand 
balance within our service area has been getting very critical.

We have been taking all measures to ensure the stable power supply 
including receiving electricity from other utilities through frequency 
converting station. Also, the national government has been asking 
people and industry to cooperate in energy savings. 

However, considering the critical balance of our power supply capacity 
and expected power demand forward, in order to avoid unexpected blackout, 
TEPCO has decided to implement rolling blackout (planned blackout 
alternates from one area to another). We sincerely regret to cause the 
anxiety and inconvenience to our customers and the society despite our 
endeavor to avoid blackout. We will make every effort to restore stable 
power supply as soon as possible.

On March 14th (Monday)
Regional block and time periods planned to have rolling blackout are as 
follows (and as per attached). The actual extension of blackout for each 
block are planned to be approximately 3 hours each. 
For customers who will be subject to rolling blackout, please be prepared 
for the announced blackout periods. Also for customers who are not subject 
to blackouts, TEPCO appreciates your continuous cooperation in reducing 
electricity usage by avoiding using unnecessary lighting and electrical 

[Expected rolling blackout regions]
Block 1: 6:20 - 10:00 (Approximately 3 hours within the period) 
Block 2: 9:20 - 13:00 (Approximately 3 hours within the period)
Block 3:12:20 - 16:00 (Approximately 3 hours within the period)
Block 4:13:50 - 17:30 (Approximately 3 hours within the period)
Block 5:15:20 - 19:00 (Approximately 3 hours within the period)
Block 1:16:50 - 20:30 (Approximately 3 hours within the period)
Block 2:18:20 - 22:00 (Approximately 3 hours within the period)

●Please refer to the attached for the detailed region of the blocks.
●Starting and ending time of blackout periods may slightly differ.
●Depending on supply and demand conditions on the actual days, 
  blackouts may occur at times which were not previously announced.

●Please DO NOT touch cut-off Electric wire.
●In order to prevent fire, please make sure to switch off the 
  electric appliances such as hair drier and to shut down the breaker 
  of distribution board when you leave your house.
●For the customer who has in-house power generation, please secure 
  fuel for generator.

[Reference: Status of demand and Supply]
●Expected Demand and Supply on 13th March(Sun)
  Estimated Demand: 37,000MW (18:00-19:00)
  Supply capacity:  37,000MW

●Expected Demand and Supply on 14th March(Mon)
  Estimated Demand: 41,000MW (18:00-19:00)
  Supply capacity:  31,000MW


Expected Rolling Blackout Areas <March 14, 2011 6:20-10:00, 16:50-20:30>(PDF 13.1KB)
Expected Rolling Blackout Areas <March 14, 2011 9:20-13:00, 18:20-22:00>(PDF 10.3KB)
Expected Rolling Blackout Areas <March 14, 2011 12:20-16:00>(PDF 13.3KB)
Expected Rolling Blackout Areas <March 14, 2011 13:50-17:30>(PDF 9.79KB)
Expected Rolling Blackout Areas <March 14, 2011 15:20-19:00>(PDF 13.0KB)

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