An earthquake faultline is being suspected to be active under a nuclear plant covering the oldest reactor of the country. As per the findings of a new report, utilities in Japan have plummeted as a consequence of this fault.

Kansai Electric Power Co. is the second largest stakeholder in Japan Atomic Power Co. responsible for the management of the Tsuruga nuclear plant. The plant is on the coast northeast of Osaka by 127 kilometers.

It had been reviewed this month by geologists and the same revealed that the unit might face decommissioning. Kansai Electric's Ohi plant is a house to Japan's sole operating reactors. It is one of the six nuclear facilities, which are being examined by the Nuclear Regulation Authority to find probable active fault lines.

The shares of Kansai Electric have dropped by some 9.7%, which is not small, rather a biggest intraday decline from Oct. 23. It has been found that the closing was 4.4% lower in Tokyo at 742 yen.

"The assessment raises the risk that the nuclear watchdog will come to a similar conclusion for other atomic generators under investigation", Mitsubishi UFJ Morgan Stanley's Tokyo-based analyst Reiji Ogino was quoted as saying.

Now, additional investigations are being conducted by the utility since an NRA team has been confirming if the Ohi station fault is active.