The shortage of electricity in Kanto and Tohoku area is severe, so other electric power companies like Chubu and Kansai Denryoku are going to give power to Kanto. So please save the power at night, and people need it can use it for medical uses or catching information about evacuation in Kanto and Tohoku area.
EDIT: This information is wrong. I’m sorry not to make sure the source! The Kansai Electricity announced that they had to change the frequency from Kansai’s to Kanto’ s, so it’s not easy to send such a huge power in one time. Someone started sending this mail as a chain mail. So I’ve heard.