Power providers said they used record amounts of liquefied natural gas last year to replace nuclear generation.
The 10 regional power utilities burned 52.9 million metric tons of LNG in the fiscal year ended in March, up 27 percent from the prior year, according to data Monday from the Federation of Electric Power Companies.
The previous record for LNG consumption was 41.9 million metric tons in the year ended in March 2008, federation spokesman Tetsu Oshikiri said Monday.
The utilities' consumption of petroleum, which includes crude and fuel oil, more than doubled to 23.3 million kiloliters, according to the federation's data. Petroleum consumption was the highest in at least 10 years, said Oshikiri. Crude and fuel oil consumption was 57.7 million kiloliters in the year ended in March 1974, he said.
The average operating rate of nuclear plants in the latest fiscal year was 24 percent, down from 67 percent a year earlier, the federation said. The atomic utilization rate last year was the lowest since Japan's first reactor started in fiscal 1968.
Thermal-power generation rose 26 percent from a year earlier, the federation said. In the wake of the Fukushima crisis, Japan had one nuclear reactor, with a capacity of 912 mw, or 1.9 percent of the total, operating as of the end of March.