Tokyo Electric Power Co. burned twice as much coal for power generation in 2013 than it did in 2012 as the company spent the entire year without using any nuclear capacity.
Tepco used 6.4 million metric tons of coal last year, compared with 3.1 million in 2012, according to data from the company's website. LNG use rose 1.8 percent to 24 million tons.
The company's coal and LNG use last year were the highest since at least 2004, the earliest complete calendar year of data provided on Tepco's website.
The utility started two coal units with combined capacity of 1,600 megawatts in April and boosted consumption of coal, which is a cheaper source for electricity generation than fuel oil or crude.