A lawsuit was filed Friday by 154 people in Fukui and other prefectures seeking to shut down the only nuclear reactors now in operation in Japan, at Kansai Electric Power Co.'s power plant in Oi, Fukui Prefecture, contending Kepco had the two units restarted before their safety was guaranteed.

The complaint filed with the Fukui District Court said the Fukushima No. 1 triple-meltdown catastrophe that started last year had demonstrated the "totally unacceptable risks of nuclear power plants."

The suit was filed a day after around 1,100 people in 17 prefectures pressed a similar complaint against Kepco and the central government, also seeking to have the Oi plant reactors halted.