Japan is rechecking the information it has on its nuclear plants’ resistance to earthquakes, trade and industry ministry Yukio Edano said, amid rising concern that a new powerful quake could trigger fresh problems at the nation’s nuclear facilities.

The media reported that a second plant in three months has been discovered to be placed on top of a faultline, a thing that is not allowed by safety regulations.

Japan’s Nuclear and Industrial Safety Agency (NISA) reviewed excavation data for a reactor at the Shika station, northwest of Tokyo, and found that an active fault line is placed beneath it.

“We will hold hearings to get experts’ opinions on nuclear plants that were judged to have been based over no active faults in the past,” Edano said. “We are rechecking all plants.”

Japan’s politicians decided to go ahead with the restart of nuclear reactors, citing the nation’s need for energy, despite the fact that the majority of Japanese do not agree, according to recent polls.