March 16, 2011--Researched by Industrial Info Resources East Asia (Kofu-shi, Japan)--Among Japan's power providers affected by Friday's earthquake, Tohoku Electric Power Company Incorporated (TYO:9506 ) (Tokuden) (Sendai, Japan) was hit hardest. Immediately following the earthquake, nearly 5 million households were without power, and the region lost nearly 20 gigawatts (GW) of capacity. Tokuden's service area is comprised of the Tohoku region, the northern part of the main island. This region includes Aomori prefecture, Iwate prefecture, Akita prefecture, Miyagi prefecture, Yamagata prefecture, Fukushima prefecture and Niigata prefecture.