Typhoon Faxai damaged electric supply chains in a wide area of the Kanto region, including Tokyo, and its surrounding areas.
Electricity will likely not be fully restored by the end of the day in some parts of the Tokyo metropolitan area, which was battered by the typhoon early Monday.
Faxai made landfall in Chiba Prefecture, east of Tokyo, at about 5 a.m..
The typhoon toppled a steel tower in Kimitsu City, Chiba, and caused damage to electricity poles and power lines. Wide areas within Tokyo Electric Power Company's jurisdiction, mainly in the Kanto region, are being hit by power outages. As of 6 p.m., nearly 740,000 households are still without power, mostly in Chiba Prefecture.
TEPCO announced that southern Chiba Prefecture, southern Kanagawa Prefecture, and the coastal areas of Ibaraki Prefecture may remain without power after Monday. A blackout will also likely continue in the eastern part of the Izu Peninsula in Shizuoka Prefecture, central Japan.
Meanwhile, power has been restored in the remaining parts of Saitama and Tochigi prefectures that were without power. Power in Tokyo is to be fully restored by the end of the day.
The utility will dispatch more than 200 power-supply vehicles to medical institutions, evacuation centers and other facilities in these regions. It hopes to finalize restoration plans by the end of the day.
A TEPCO Power Grid official apologized for the inconvenience, saying efforts are in place to bring back power in these areas by alternating power supply routes.