In 2011 Japan closed the largest nuclear power plant on the planet. Now he has decided to reopen it in the midst of the energy debate

The nuclear debate, which Japan thought closed, returns to the scene. The authorization of the governor of Niigata to reactivate Kashiwazaki-Kariwa, the largest atomic plant in the world, has set off alarms: citizen distrust, the shadow of Fukushima and doubts about whether TEPCO is the right company to lead the country’s new energy stage are emerging.

A new nuclear revival? The Kashiwazaki-Kariwa plant, managed by Tokyo Electric Power Company (TEPCO), has not produced a single kilowatt since 2012. The closure was a direct consequence of the 2011 tsunami and the three meltdowns from Fukushima Daiichia blow that left reactors with similar designs under suspicion. That technical coincidence was enough to keep its seven reactors on hold for more than ten years, despite the fact that the plant was essential for the electricity supply of northeastern Japan.

According to Japan TimesHideyo Hanazumi has authorized a step-by-step reactivation that will start with reactor 6—one of the most recent and powerful—and that, later, will also include reactor 7. Altogether, the complex exceeds 8,000 MW of capacity, a figure that not only imposes: it maintains it as the largest nuclear facility on the planet.

A significant change for the Japanese country. Kashiwazaki-Kariwa has gone from a technical project to a strategic move. As reported by the Financial TimesTokyo trusts that its reactivation will contribute to lowering the electricity bill and ensuring energy sources with fewer emissions, at a time complicated by the Russian invasion of Ukraine and the fall of the yen, which makes fossil fuel imports more expensive.

Japan, which before Fukushima generated almost 30% of its electricity with atomic plants, fell to practically zero after the disaster. Since then 14 reactors have reopened and others await local or regulatory approvals. The government aims for nuclear energy to once again represent 20% of the mix in 2040. In addition, TEPCO would improve its annual accounts by around 100 billion yen thanks to the restart, according to Japan Forwardat a time when it continues to face enormous costs for the dismantling of Fukushima Daiichi.

The reactivation process. The restart will begin with unit 6, which already has fuel loaded and will begin commercial operations before March of next year. To move forward, TEPCO must respond to the Government’s demands, which include updating all security systems and improving emergency evacuation plans.

The process has not been easy. As detailed by Japan Timesthe plant passed safety reviews in 2017, but then suffered a veto from the Nuclear Regulatory Authority due to deficiencies in anti-terrorist measures, lifted in 2023. In addition, TEPCO had to incorporate biometric controls and correct security flaws after new internal incidents.

Is there controversy? Yes, and a lot. According to a survey cited by the BBC50% of Niigata residents support the revival, while 47% oppose it. However, almost 70% express their concern because the person operating the plant is the same company that caused the accident.

From Japan Times He adds that the rejection intensifies in some of the towns located within 30 kilometers of the plant, where the majority fear a new disaster or distrust the company. Another source of discomfort, also pointed out by this medium, is that the electricity generated is not used in Niigata, but in the Tokyo region.

The political dimension is equally tense. Hanazumi, aware of the sensitivity of her decision, has announced that he will submit his continuity as governor to the vote of the prefectural assembly, the only body that can remove him.

But there is something else at play. The reopening of Kashiwazaki-Kariwa is seen as a pillar to ensure the country’s energy security and avoid possible power outages in Tokyo. It would also allow reducing electricity rates that have increased notably since 2011. At the same time, Japan is not only restarting reactors: it is also is planning the construction of new plants with fourth generation reactors, which would mark a new chapter in the country’s energy policy.

More than a return to the atom. The country that one day vowed not to depend on atomic energy again has ended up returning to it, driven by necessity, geopolitics and the urgency to decarbonize. It remains to be seen if this decision will also ignite the confidence of a citizenry that still carries the memory of Fukushima or if, on the contrary, the return to the atom will deepen a division that has been open for more than a decade.

Although the governor’s approval is the decisive step, there are still procedures: the prefectural assembly must debate and vote on the decision in December, and the Japanese nuclear regulator must complete the formal procedures for reactivation.

Image | IAEA Imagebank

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