Electricity Updates as of April 5, 2011

Ibaraki Prefecture has sent out a document to ask for our cooperation in conserving energy. It included this document which shows the energy demand peaks for March (first graph) and July (second graph):

Electricity Demand Peaks

The first graph shows that March has two peaks. (The x axis represents the hours in a day) The first is in the morning when people start working, but then it goes down a bit in the afternoon as it gets warmer. The second peak goes up even higher than the first as we go home, turn on lights, and use heaters.

The second graph shows that July is going to be a bigger problem. We use air conditioning throughout the day, and especially between 1pm and 4pm.

In March (and other cold months), we have to focus on decreasing our demand in the mornings and evenings, and in July (and other warm months), we have to focus on the midday time.

Here are some suggestions of ways that you can reduce your use of electricity.


  • Try not to use air conditioners or heaters in the mornings and evenings.
  • Set your heater to 19C or below.
  • Try to use your heater for shorter amounts of time by turning it off instead of leaving it running all the time.
  • Increase the efficiency of your heating devices by cleaning out any air filters.
  • Dress warmly.
  • In the evenings, use blinds and curtains to reduce drafts.


  • Turn off lights in rooms that people are not using.
  • Try not to use lighting in the morning and evenings.
  • Turn off outside lights, hallways lights.
  • Turn off lights at lunch time.
  • Turn off all indoor and outdoor lights when you leave the house/office.
  • Make sure you are using lights that do not use a lot of energy.

Office Equipment and Other Appliances

  • Try not to use office equipment and televisions very much, especially during the peak hours.
  • If you are not using your computer for long periods of time, turn it off or put it in standby mode.
  • Turn printers, copiers, and other machines off when not using them.
  • Make fewer copies, print fewer documents.
  • Turn televisions off if no one is watching them.
  • Adjust the temperature of the inside of your fridge according to the season.
  • Don’t put too many things in the fridge as that decreases its efficiency.
  • Don’t open the fridge when you don’t need to.
  • Turn electric kettles, hot water pots, coffee makers, and microwaves off and pull out the plug when you are not using them to prevent them from using small amounts of power even when they are supposed to be off (this is known as “vampire power” or “standby power”).

Elevators, Escalators

  • Try not to use elevators or escalators very much, especially during the peak hours.
  • In your building, reduce the number of operating elevators to half or less and make it so they don’t stop on the lower floors.
  • Provide only the minimum number of escalators.
  • Use the stairs. (Rule: Use the stairs for two up, three down.)


  • Put the lid down on electric toilets.
  • Unplug electric toilets.
  • Turn electric hot water heaters off in sinks or set them on timers.

Entrance, Garden

  • Turn electric doors off, if possible.
  • Turn off water fountains.

In the Office

  • Put someone in charge of monitoring your office’s conservation of energy.
  • Tell others about what you are doing.
  • Only purchase appliances that are designed as low energy use appliances.
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