Kansai Electric Power Co. is planning to hike its household electricity rates by around 12 percent on average from next April, according to industry sources.

Kyushu Electric Power Co. also intends to raise its household rates by an average of 8.5 percent from the April 1 start of the next fiscal year, the sources said Friday.

Kepco plans to apply Monday for government approval of its first rate hike since 1980, while Kyushu Electric will likely follow suit Tuesday.