Tokyo Electric Power Co. is thinking about cutting its rates by an average of 4 percent next spring, company sources said Saturday.

The plan emerged as the world's largest private power supplier expects financial burdens for reprocessing spent nuclear fuel from its nuclear power plants to shrink, the sources said.

A rate cut would intensify competition among traditional electricity suppliers, which will likely follow suit and lower their charges, as well as among gas suppliers and other firms that have entered the power supply business amid liberalization of the electricity market, according to analysts.