The possibility of seeing new nuclear reactors in Japan is back on the table after Kansai Electric Power (Kepco) announced it has decided to resume studies that were suspended after the Fukushima disaster in 2011. This step marks a significant shift in the country's energy policy , which has been heavily influenced by the scarcity of natural resources and the urgent need to ensure national energy security.
The Fukushima accident in March 2011 marked a turning point for nuclear power in Japan, leading to the mass closure of reactors and the halting of ongoing projects. However, Kepco's recent statement emphasizes the continued relevance of nuclear power as an essential part of the energy mix, especially given the limited availability of fossil fuels and the pressure to reduce carbon emissions.
Return to studies at the Mihama nuclear plant
The project, which initially envisioned building a new nuclear reactor to replace Unit 1 at the Mihama plant, had been stalled for over a decade. Kepco has stated its intention to conduct voluntary on-site investigations to determine whether the site meets the stringent geological, geomorphological, and regulatory criteria required after Fukushima.
The company has emphasized that the process will include analyzing site conditions, assessing seismic risks, and adapting to new legal and technical requirements. The goal is to verify the facility's viability under the most advanced safety standards , which now include the development of advanced light water reactors and compliance with updated regulatory policies.
The Japanese energy context: between resource scarcity and the need for renewal
Japan, which operated 54 nuclear reactors before the Fukushima disaster, currently has only 14 operational . No new reactors have been built in the country since 2009. Kepco manages seven reactors, five of which are over 40 years old, highlighting the urgent need to modernize and expand existing capacity to meet future energy demand.
The decision to resume these studies stems from concerns about sustainability and a stable energy supply in the current context. The company reiterates that nuclear energy must play a key role in Japan's energy future, not only as a source of electricity but also as a guarantor of security, economic efficiency, and environmental protection, in accordance with its Zero Carbon Vision strategy.
Economic implications and reactions in the sector
Kepco's announcement has had a notable impact on financial markets. The company's shares rose 3,55% on the Tokyo Stock Exchange , even reaching a 5% increase during the trading day. This positive effect also extended to other Japanese electric utilities such as Tokyo Electric Power Company, Hokkaido Electric Power, and Chugoku Electric Power, which registered significant increases in their share prices.
In addition to the stock market boost, the news has reignited the debate about the role of nuclear power in Japan and the need to modernize existing infrastructure. The challenge now is to reconcile societal demands for security with the urgent need to guarantee electricity supply in the face of increasingly limited natural resources.
The challenge of security and social acceptance
The reactivation of the project in Mihama will be carried out under the close supervision of regulatory bodies and with a special emphasis on transparency towards the local population. Kepco has stressed the importance of keeping residents informed and gaining their support, aware of the reservations generated after the Fukushima crisis.
The evaluation process will consider not only technical and environmental factors, but also the social impact and public perception of nuclear energy as a safe and viable option. Should the studies confirm the feasibility of construction, the new Mihama reactor would be the first in Japan since the 2011 accident, marking a new chapter in national energy policy.
Kepco's initiative to resume studies on building a new nuclear reactor in Mihama reflects Japan's complex energy situation and the need to pursue long-term solutions . While awaiting the results of geological surveys, the country faces the challenge of balancing security, sustainability, and social expectations in its future strategy.