Tokyo Electric Power Co. said Monday it posted a ¥781.6 billion group net loss for fiscal 2011 after incurring massive costs from the meltdown disaster at the Fukushima No. 1 nuclear plant, compensation for the victims and fuel costs for reverting to thermal power.

The figure dwarfed its ¥1.24 trillion net loss from 2010.

Sales for fiscal 2011, which ended in March, remained fairly even at ¥5.34 trillion, down 0.4 percent from the previous year, but a ¥272.5 billion operating loss reversed the ¥399.6 billion operating profit from the year before as costs soared for thermal power generation.