Chubu Electric Power’s data fraud linked to earthquake risks at its Hamaoka nuclear power plant has splashed cold water on the Japanese government’s energy policy of maximizing nuclear power use.

Shinsuke Yamanaka, chief of the Nuclear Regulation Authority, has said that the NRA’s safety screening of the Nos. 3 and 4 reactors at the plant in Shizuoka Prefecture is expected to “go back to square one.”

A delay in the restart of Hamaoka reactors will deal a blow to Chubu Electric’s earnings and affect the government’s goal of raising the share of nuclear power in the country’s energy mix.