In a surprising development that casts a shadow over Japan's efforts to regain its role in the nuclear energy sector, the Kashiwazaki-Kariwa plant , the world's largest nuclear power plant by generating capacity, was shut down on Thursday, just hours after one of its reactors was restarted. The decision, confirmed by operator TEPCO (Tokyo Electric Power Company), reignites the debate surrounding the safety and future of nuclear power in the country.
Details of the incident and the technical reasons
TEPCO spokesperson Takashi Kobayashi explained that the suspension was an immediate response to an alarm by a sensitive monitoring system during reactor operations. The company confirmed that the reactor is currently operating in a completely stable condition and that no radiation leaks or adverse environmental impacts have been detected. Investigations are underway to determine the precise cause of the alarm, but no timeline has been given for resuming operations.
It is worth noting that the restart process had faced previous obstacles, as it was scheduled to begin last Tuesday, but was postponed due to a similar technical problem related to the alarm system, which was resolved on Sunday before the last attempt.
The Shadows of the Fukushima Disaster and the Historical Context
This incident is particularly sensitive given Japan's recent history with nuclear disasters. The Kashiwazaki-Kariwa plant, located in Niigata Prefecture (west-central Japan), was taken offline as part of the nationwide shutdown of nuclear reactors following the triple tragedy of March 2011 (earthquake, tsunami, and the Fukushima nuclear disaster). Since then, Japanese power plants have been subject to extremely stringent safety standards, and this attempt to restart them is considered a pivotal step in moving beyond that era.
Strategic importance and energy challenges
Japan's relentless pursuit of restarting nuclear reactors is driven by a pressing economic and strategic need. Lacking natural resources, Japan seeks to reduce its heavy reliance on importing expensive and polluting fossil fuels. The government aims to achieve carbon neutrality by 2050 , in addition to meeting the enormously increasing demand for electricity resulting from the expansion of data centers and artificial intelligence .
Japanese public opinion is divided
Despite the official approval from the governor of Niigata Prefecture last month and the government's support, exemplified by Prime Minister Sanae Takaichi's statements in favor of civilian nuclear power, Japanese public opinion remains deeply divided. Local polls show that nearly 60% of the population opposes restarting the plant, compared to only 37% who support it. This opposition was demonstrated by demonstrations organized by dozens of citizens, mostly elderly, in front of the plant despite the bitter cold, reflecting persistent and deep-seated fears of a repeat of past disasters.
