On July 29, JR Central announced that the company would maintain the operation of Tokaido Shinkansen as it is. It is because Tokaido Shinkansen, which plays a major role as a transportation infrastructure, was ruled out from the objects of planned blackout
Trains on conventional lines except Kisei Line will run as usual even when blackout is implemented. Kisei Line has possibility of changing operation plans between Kumano-shi and Shingu ,because blackout makes crossing gates along the line malfunction.
Citation: http://www.asahi.com/travel/rail/news/NGY201206290041.html
Because the area shared by Kepco*1 and JR Central is limited, JR Central will have less difficulty in saving electricity than JR West.
*1:Electric power shortage is the urgent problem of the company.
