As of July 22, 2025, Kansai Electric Power (KEPCO) announced that it will begin surveys for the construction of a new nuclear power plant at its Mihama power station in Fukui prefecture, western Japan, to replace the existing facility. [1] marks Japan’s first concrete step towards building a new nuclear reactor since the Great East Japan Earthquake in 2011. The surveys would focus on topography, geology, and other studies to ensure compliance with regulatory requirements. They will also include communications with the local community. KEPCO had been analyzing a successor to the Mihama No. 1 reactor since November 2010, but suspended the study after the 2011 disaster. In 2015, it decided to decommission the No. 1 and No. 2 reactors at Mihama.

[1] https://www.kepco.co.jp/english/corporate/ir/brief/pdf/2025_jul22_1.pdf