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Japan to restart world’s biggest nuclear plant on Monday


Japan Today 8th Feb 2026, https://japantoday.com/category/national/japan-to-restart-world’s-biggest-nuclear-plant

Japan will switch the world’s largest nuclear power plant back on next week, after a glitch with an alarm forced the suspension of its first restart since the 2011 Fukushima disaster.

The announcement came after TEPCO restarted the reactor on January 21 but shut it off the following day after an alarm from the monitoring system sounded.

Due to an error in its configuration, the alarm had picked up slight changes to the electrical current in one cable even though these were still within a range considered safe, Takeyuki Inagaki, the head of the Kashiwazaki-Kariwa plant run by Tokyo Electric Power (TEPCO), said.

The firm has now changed the alarm’s settings as the reactor is safe to operate, Inagaki said.

The commercial operation will commence on or after March 18 after another comprehensive inspection, he said.

Kashiwazaki-Kariwa is the world’s biggest nuclear power plant by potential capacity, although just one reactor of seven will restart.

The facility had been offline since Japan pulled the plug on nuclear power after a colossal earthquake and tsunami sent three reactors at the Fukushima atomic plant into meltdown in 2011.

Resource-poor Japan now wants to revive atomic energy to reduce its reliance on fossil fuels, achieve carbon neutrality by 2050 and meet growing energy needs from artificial intelligence.

Kashiwazaki-Kariwa is the first TEPCO-run unit to restart since 2011. The company also operates the stricken Fukushima Daiichi plant, now being decommissioned.

Public opinion in the area around the plant is deeply divided: Around 60 percent of residents oppose the restart, while 37 percent support it, according to a survey conducted by Niigata prefecture in September.

In January, seven groups opposing the restart submitted a petition signed by nearly 40,000 people to TEPCO and Japan’s Nuclear Regulation Authority, saying that the plant sits on an active seismic fault zone and noted it was struck by a strong quake in 2007.

February 10, 2026 Posted by | Japan, politics | Leave a comment

Inside Japan’s Controversial Shift Back to Nuclear Energy

Oil Price, By Felicity Bradstock – Jan 24, 2026

  • Japan is shifting its energy policy to redevelop its nuclear energy capacity, aiming for 20 percent of its power from nuclear energy by 2040 to support climate goals.
  • The world’s largest nuclear facility, the Kashiwazaki-Kariwa plant, is preparing to restart operations, which marks a major step in the government’s nuclear deployment plans despite significant public opposition and safety concerns.
  • Public confidence in the nuclear sector has been harmed by the 2011 Fukushima disaster and further damaged by recent news of a utility, Chubu Electric Power, fabricating seismic risk data.

Alongside plans to establish a strong renewable energy sector, Japan aims to redevelop its nuclear energy capacity to boost its power and support its climate goals. However, with memories of the Fukushima nuclear disaster still fresh, many in Japan are worried about the risks involved with developing the country’s nuclear capacity. Nevertheless, the government has big plans for a new nuclear era, commencing with the restarting of the world’s biggest nuclear facility…………………………………………………………..

The Fukushima accident prompted a widespread distrust of nuclear power in Japan for more than a decade. However, in February 2025, Japan’s Economy, Trade and Industry Ministry published a draft revision of the national basic energy plan, in which the statement on moving away from nuclear power has been removed. Later that month, the Cabinet approved the revised Seventh Strategic Energy Plan, which stated the aim of producing 20 percent of power from nuclear energy by 2040. This marked a significant shift in Japan’s approach to nuclear power. 

Before 2011, Japan had 54 reactors that provided around 30 percent of the country’s electricity. At present, just 14 of 33 operable reactors are producing power, while efforts to restart others have been thwarted due to public opposition.  

Japan is home to the world’s largest nuclear facility, the 8.2 GW Kashiwazaki-Kariwa plant, which covers 4.2 km2 of land in Niigata prefecture, 220km north-west of Tokyo. The facility was developed in 2012, but it has yet to come online, as, following the Fukushima disaster, the poor public perception of safety in the nuclear sector led the government to shut down several nuclear reactors. 

Kashiwazaki-Kariwa is operated by Tokyo Electric Power (Tepco), the same utility that managed Fukushima. Tepco aimed to restart one of the seven reactors at Kashiwazaki on 19th January, but was forced to delay the restart as an alarm malfunctioned during a test of equipment, although the company expects to bring it online within the next few days. The restarting of reactor No. 6 will increase Tokyo’s electricity supply by around 2 percent, as well as mark a major step forward in the government’s plans to deploy more nuclear power in the coming years. 

However, many in Japan are still wary about the risks involved with nuclear power projects. Many of those living with proximity to Kashiwazaki-Kariwa are worried about the potential for another Fukushima-scale event, which could lead up to 420,000 residents to be evacuated from across a 30 km radius…………………..

public confidence in nuclear power companies in nuclear power companies has been further harmed due to recent news of a firm fabricating data. It was found that Chubu Electric Power, a utility in central Japan, fabricated seismic risk data during a regulatory review, ahead of a possible restart of two reactors at its idle Hamaoka plant. In response, Japan’s Nuclear Regulation Authority (NRA) scrapped the safety screening at the plant, which is located on the coast, around 200 km west of Tokyo, in an area prone to Nankai Trough megaquakes. The NRA is now considering inspecting Chubu’s headquarters. 

…………Despite overwhelming public opposition to the development of Japan’s nuclear power sector, the government plans to gradually restart several reactors and expand nuclear capacity in the coming decades to support decarbonisation aims. https://oilprice.com/Alternative-Energy/Nuclear-Power/Inside-Japans-Controversial-Shift-Back-to-Nuclear-Energy.html

January 26, 2026 Posted by | Japan, politics | Leave a comment

An alarm sounds and Tepco suspends restart at Kashiwazaki-Kariwa 

A September survey asked 12,000 residents if they believed the conditions for restarting operations were already in place — 37% responded positively and 60% negatively.

By Francis Tang, 23 Jan 26, https://www.japantimes.co.jp/news/2026/01/23/japan/science-health/kashiwazaki-kariwa-alarm/

One day after Tokyo Electric Power Company Holdings (Tepco) restarted the world’s largest nuclear power plant, what was meant to mark a turning point in Japan’s long-stalled nuclear revival became an object lesson in just how fragile that effort remains.

At stake is Japan’s decadelong attempt to reduce imported energy dependency, which increased following the 2011 disaster at the Fukushima No. 1 nuclear power plant, and restore trust lost during the meltdown and in the 15 years since.

On Wednesday night, Tepco restarted reactor No. 6 at the Kashiwazaki-Kariwa nuclear power plant — the company’s first restart since all of its reactors were shut down in the aftermath of Fukushima.

Hours later, an alarm sounded for one rod inside the reactor, and the removal of control rods was suspended. About 16 hours later, Tepco announced that it would carry out a “planned temporary shutdown,” taking the reactor back offline to allow a full probe into the cause of the alarm to proceed.

“We are not assuming that the investigation and related work will be wrapped up in one day or two, but at this point, we cannot say at all how many days it will take,” plant manager Takeyuki Inagaki told a news conference on Thursday night.

Control rod insertion began at 11:56 p.m. on Thursday, and the reactor was formally shut down early Friday morning, according to the company.

“For now, our priority is to move forward with the cause investigation,” Inagaki said.

The company said that the alarm came from a control panel for a motor that drives the control rod, indicating a problem in the control panel. A separate alarm indicated a problem with an inverter.

Tepco added that the alarms indicate with light and sound.

Control rods regulate the nuclear reaction inside a nuclear power reactor. They are pulled out to start fission and reinserted to slow and stop it.

Located 120 kilometers northwest of Tokyo, Kashiwazaki-Kariwa is the world’s largest nuclear power plant, with seven reactors. It is one of the three nuclear power plants owned by Tepco, with the other two located in Fukushima.

After the March 2011 earthquake and subsequent tsunami triggered triple meltdowns at the Fukushima No. 1 plant, all nuclear plants in Japan were shut down. While some owned by other operators have since resumed operation after meeting stricter safety standards, Tepco has not been able to restart any of its reactors until this week.

Two prerequisites come into play when the government greenlights the restart of a nuclear plant: that it meets the post-Fukushima regulation standards set by the Nuclear Regulation Authority, and that it gains the “understanding” of local communities.

The local community in Niigata Prefecture, where Kashiwazaki-Kariwa is located, has mixed views on the plant’s restart. A September survey asked 12,000 residents if they believed the conditions for restarting operations were already in place — 37% responded positively and 60% negatively.

In 2017, Kashiwazaki-Kariwa units No. 6 and No. 7 passed Nuclear Regulation Authority reviews required for restart, but the subsequent discovery of inadequate antiterrorism measures in 2021 led to an effective withdrawal of approval through 2023.

Tepco was initially set to restart the reactor on Tuesday, but postponed the restart after a problem — which was separate from Thursday’s — was identified in one of the control rod alarms during testing.

An alarm that was designed to notify of unintended control rod removals did not go off when one of the rods was pulled out, the company said on Saturday. The process to address this delayed the restart by a day.

The government has positioned its restart as central to Japan’s energy strategy, which includes a goal of achieving 30% to 40% energy self-sufficiency by fiscal 2040, and having nuclear power generating roughly 20% of the country’s power, up from 8.5% in fiscal 2023

Prime Minister Sanae Takaichi is also keen on energy security.

During her campaign for the ruling Liberal Democratic Party’s presidency last year, she vowed to achieve “100% self-sufficiency” in energy, and said in her first policy speech as prime minister that her government would aim for the quick implementation of next-generation reactors and fusion power.

In the aftermath of the Fukushima disaster, Japan’s rate of self-sufficiency on energy dropped from 20.2% in fiscal 2010 to 6.5% in fiscal 2012. While it rebounded to above 10% in recent years, data center and semiconductor needs are expected to lead to a surge in electricity demand.

Kashiwazaki-Kariwa’s restart is “extremely important” in resolving vulnerabilities in eastern Japan’s power supply, containing electricity prices and developing decarbonized power sources, Economy, Trade and Industry Minister Ryosei Akazawa said on Friday, calling the restart a “highly significant step.”

“Under guidance of the Nuclear Regulation Authority, Tepco should continue to respond with the highest priority placed on safety and with a strong sense of vigilance. It should first and foremost work to identify the cause and resolve the issue, and provide careful and easy-to-understand explanations to local communities and the public,” he added.

January 25, 2026 Posted by | Japan, safety | Leave a comment

Nuclear lapses overshadow reactor restarts in post-Fukushima Japan.

Power provider admits to manipulating data to downplay effect of large
earthquake. This month, one of Japan’s biggest utilities admitted to
manipulating data to downplay the effect of a large earthquake on a nuclear
power plant under review for reopening.

The admission followed a security
failure at Japan’s nuclear energy watchdog, in which an employee lost a
work phone with contact details of staff involved in nuclear security
during a personal trip to China.

The compliance lapses at Chubu Electric
and the Nuclear Regulation Authority threaten confidence in Japan’s safety
regime as the country tries to reopen its nuclear plants 15 years after a
massive quake caused a tsunami that inundated reactors in Fukushima.

FT 22nd Jan 2026,
https://www.ft.com/content/0bb511ab-80dc-44c2-ab06-d0e587c8367e

January 24, 2026 Posted by | Japan, secrets,lies and civil liberties | Leave a comment

Nuclear reactor owned by Fukushima plant operator TEPCO to shut down again hours after restart.

By ASSOCIATED PRESS, 22 January 2026 https://www.dailymail.co.uk/wires/ap/article-15487139/Nuclear-reactor-owned-Fukushima-plant-operator-TEPCO-suspends-hours-old-restart.html

TOKYO (AP) – A reactor at the world’s largest nuclear power plant that restarted for the first time since the 2011 Fukushima nuclear disaster is now being shut down again Thursday due to a glitch that occurred hours after the unit’s resumption, its operator said.

The No. 6 reactor at the Kashiwazaki-Kariwa plant in north-central Japan reactivated Wednesday night for the first time in 14 years, as plant workers started removing neutron-absorbing control rods from the core to start stable nuclear fission.

But the process had to be suspended hours later due to a malfunction related to control rods, which are essential to safely starting up and shutting down reactors, the Tokyo Electric Power Company Holdings said.

TEPCO, which also manages the wrecked Fukushima plant, said there was no safety issue from the glitch.

Kashiwazak-Kariwa plant chief Takeyuki Inagaki told a news conference that he has decided to shut down the reactor to ensure safety. The operation had to stop when an alarm went off after 52 of the 205 control rods were removed from the core, he said. Inagaki said he hoped to start putting them back in later Thursday to bring the No. 6 reactor to a shutdown.

“The equipment is essential to safe operation, and we will examine it inside out,” he said, adding that the reactor will not be restarted until the cause is found and measures are taken.

“I don’t think this is going to be resolved in a couple of days,” Inagaki said.

The restart at the Kashiwazaki-Kariwa plant was being watched closely since TEPCO also runs the Fukushima Daiichi plant that was ruined in the 2011 quake and tsunami. Resource-poor Japan is accelerating atomic power use to meet soaring electricity needs.

All seven reactors at Kashiwazaki-Kariwa have been dormant since a year after the meltdowns of reactors at the Fukushima plant contaminated the surrounding land with radioactive fallout so severe that some areas are still uninhabitable.

TEPCO is working on the cleanup at the Fukushima site that´s estimated to cost 22 trillion yen ($139 billion). It’s also trying to recover from the damage to its reputation after government and independent investigations blamed the Fukushima disaster on TEPCO´s bad safety culture and criticized it for collusion with safety authorities.

Fourteen other nuclear reactors have restarted across Japan since 2011, but the Kashiwazaki-Kariwa plant, about 220 kilometers (135 miles) northwest of Tokyo, is the first TEPCO-run unit to resume production.

A restart of the No. 6 reactor could generate an additional 1.35 million kilowatts of electricity, enough to power more than 1 million households in the capital region.

The Kashiwazaki-Kariwa plant´s combined output capacity of 8 million kilowatts makes it the world´s largest, though TEPCO plans to resume only two of the seven reactors in coming years.

January 24, 2026 Posted by | Japan, safety | Leave a comment

Mayors for Peace Joint Appeal

January 20, 2026, https://www.mayorsforpeace.org/wp-content/uploads/2026/file-2601-MfP_Joint-Appeal_January-2026_E.pdf
The milestone year of 2025—marking 80 years since the end of World War II and the atomic
bombings of Hiroshima and Nagasaki, the first use of nuclear weapons in human history—has come
to a close, and a new year, 2026, has begun. Over the past year, Mayors for Peace undertook a wide
range of peace initiatives. In particular, in August, the 11th General Conference of Mayors for Peace
was convened in Nagasaki City, where member cities from around the world engaged in extensive
discussions and renewed their shared determination to achieve a world without nuclear weapons.


Yet today, as power struggles over territory and economic influence initiated by nuclear-armed major
powers intensify, the global situation is growing ever more precarious. Distrust among states is
deepening, regional tensions are worsening in Europe, the Middle East, Latin America, and Asia, and
armed conflicts continue to spread, claiming the lives of countless innocent civilians. Moreover, as
the long-standing taboo against the use of nuclear weapons is being seriously eroded, momentum
toward nuclear disarmament and the abolition of nuclear weapons has stagnated.

Under these circumstances, the New Strategic Arms Reduction Treaty (New START Treaty)—the
only remaining nuclear disarmament and arms control treaty in force between the United States and
the Russian Federation—is set to expire in February 2026. We strongly urge both governments, which
together possess approximately 90 percent of the world’s nuclear warheads, to continue to honor the
limits of the treaty on an agreed basis and to demonstrate commendable leadership by advancing
nuclear disarmament. At the same time, we are gravely concerned that the collapse of this significant
arms control framework between the world’s nuclear superpowers could trigger an intensified global
arms race, including in nuclear weapons.


January 22 of this year marks five years since the Treaty on the Prohibition of Nuclear Weapons
entered into force in 2021. This treaty, a powerful international norm that prohibits the development,
testing, use, and threat of use of nuclear weapons, is a ray of hope amid the present depressing
situation. It was born from the heartfelt appeal of the hibakusha— “No one else should suffer as we
have.” We call upon all states to acknowledge the catastrophic and inhumane consequences of nuclear
weapons and to sign and ratify the treaty without delay.


Comprising local government leaders responsible for protecting the safety and security of their
citizens, Mayors for Peace now includes approximately 8,600 member cities in 166 countries and
regions worldwide and has worked for over 40 years toward the abolition of nuclear weapons. We
urge all policymakers to make every possible diplomatic effort to pursue the peaceful resolution of
conflicts through dialogue and to take concrete steps toward the realization of a peaceful world free from nuclear weapons.

MATSUI Kazumi , Mayor of Hiroshima , President of Mayors for Peace

SUZUKI Shiro
Vice President of Mayors for Peace
Mayor of Nagasaki

January 24, 2026 Posted by | Events, Japan | Leave a comment

15 years after Fukushima, Japan prepares to restart the world’s biggest nuclear plant.

Tepco is set to defy local public opinion and restart one of Kashiwazaki-Kariwa’s seven reactors.

for many of the 420,000 people living within a 30km (19-mile) radius of Kashiwazaki-Kariwa who would have to evacuate in the event of a Fukushima-style incident, Tepco’s imminent return to nuclear power generation is fraught with danger.

A return to nuclear power is at the heart of Japan’s energy policy but, in the wake of the 2011 disaster, residents’ fears about tsunamis, earthquakes and evacuation plans remain

Justin McCurry Guardian, in KashiwazakiMon 19 Jan 2026

The activity around the Kashiwazaki-Kariwa nuclear power plant is reaching its peak: workers remove earth to expand the width of a main road, while lorries arrive at its heavily guarded entrance. A long perimeter fence is lined with countless coils of razor wire, and in a layby, a police patrol car monitors visitors to the beach – one of the few locations with a clear view of the reactors, framed by a snowy Mount Yoneyama.

When all seven of its reactors are working, Kashiwazaki-Kariwa generates 8.2 gigawatts of electricity, enough to power millions of households. Occupying 4.2 sq km of land in Niigata prefecture on the Japan Sea coast, it is the biggest nuclear power plant in the world.

Since 2012, however, the plant has not generated a single watt of electricity, after being shut down, along with dozens of other reactors, in the wake of the March 2011 triple meltdown at Fukushima Daiichi, the world’s worst nuclear accident since Chornobyl.

Located about 220km (136 miles) north-west of Tokyo, the Kashiwazaki-Kariwa plant is run by Tokyo Electric Power (Tepco), the same utility in charge of the Fukushima facility when a powerful tsunami crashed through its defences, triggering a power outage that sent three of its reactors into meltdown and forcing 160,000 people to evacuate.

Weeks before the 15th anniversary of the accident, and the wider tsunami disaster that killed an estimated 20,000 people along Japan’s north-east coast, Tepco is set to defy local public opinion and restart one of Kashiwazaki-Kariwa’s seven reactors.

On Monday, Tepco said it would delay the restart, originally scheduled for the following day, after an alarm malfunctioned during a test of equipment over the weekend, according to public broadcaster NHK. The reactor is now expected to go back online in the coming days, NHK added.

Restarting reactor No 6, which could boost the electricity supply to the Tokyo area by about 2%, will be a milestone in Japan’s slow return to nuclear energy, a strategy its government says will help the country reach its emissions targets and strengthen its energy security.

But for many of the 420,000 people living within a 30km (19-mile) radius of Kashiwazaki-Kariwa who would have to evacuate in the event of a Fukushima-style incident, Tepco’s imminent return to nuclear power generation is fraught with danger.

They include Ryusuke Yoshida, whose home is less than a mile and a half from the plant in the sleepy village of Kariwa. Asked what worries him most about the restart, the 76-year-old has a simple answer. “Everything,” he says, as waves crash on to the shore, the reactors looming in the background.

“The evacuation plans are obviously ineffective,” adds Yoshida, a potter and member of an association of people living closest to the facility. “When it snows in winter the roads are blocked, and a lot of people who live here are old. What about them, and other people who can’t move freely? This is a human rights issue.”……………………………..


“The core of the nuclear power business is ensuring safety above all else, and the understanding of local residents is a prerequisite,” says Tatsuya Matoba, a Tepco spokesperson.

That is the one hurdle residents say Tepco has failed to overcome after local authorities ignored calls for a prefectural referendum to determine the plant’s future. In the absence of a vote, anti-restart campaigners point to surveys showing clear opposition to putting the reactor back online.

They include a prefectural government poll conducted late last year in which more than 60% of people living within 30km of the plant said they did not believe the conditions for restarting the facility had been met…………

Kazuyuki Takemoto, a member of the Kariwa village council, says seismic activity in this region of north-west Japan means it is impossible to guarantee the plant’s safety.

“But there has been no proper discussion of that,” says Takemoto, 76. “They say that safety improvements have been made since the Fukushima disaster, but I don’t think there is any valid reason to restart the reactor. It’s beyond my comprehension.”

‘The priority should be to protect people’s lives’

Just weeks before the planned restart, the nuclear industry attracted fresh criticism after it emerged that Chubu Electric Power, a utility in central Japan, had fabricated seismic risk data during a regulatory review, conducted before a possible restart, of two reactors at its idle Hamaoka plant.

“When you look at what’s happened with Hamaoka, do you seriously think it’s possible to trust Japan’s nuclear industry?” Takemoto says. “It used to be said that nuclear power was necessary, safe and cheap … We now know that was an illusion.”

Adding to local concerns are the presence of seismic faults in and around the site, which sustained damage during a 6.8-magnitude offshore earthquake in July 2007, including a fire that broke out in a transformer. Three reactors that were in operation at the time shut down automatically.

The Kashiwazaki-Kariwa restart is a gamble for Japan’s government, which has put an ambitious return to nuclear power generation at the centre of its new energy policy as it struggles to reach its emissions targets and bolster its energy security.

Before the Fukushima disaster, 54 reactors were in operation, supplying about 30% of the country’s power. Now, of 33 operable reactors, just 14 are in service, while attempts to restart others have faced strong local opposition.

Now, 15 years after the Fukushima meltdown, criticism of the country’s “nuclear village” of operators, regulators and politicians has shifted to this snowy coastal town.

Pointing out one of the many security cameras near the plant, Yoshida says the restart has been forced on residents by the nuclear industry and its political allies. “The local authorities have folded in the face of immense pressure from the central government,” he says.

“The priority of any government should be to protect people’s lives, but we feel like we have been deceived. Japan’s nuclear village is alive and well. You only have to look at what’s happening here to know that.” https://www.theguardian.com/world/2026/jan/19/japan-nuclear-plant-restart-kashiwazaki-kariwa-fukushima

January 22, 2026 Posted by | Japan, politics | Leave a comment

TEPCO postpones 1st reactor restart since Fukushima due to alarm trouble.

January 19, 2026 (Mainichi Japan), https://mainichi.jp/english/articles/20260119/p2g/00m/0bu/023000c

TOKYO (Kyodo) — Tokyo Electric Power Company Holdings Inc. said Monday it will postpone until an unspecified date the restart of its nuclear reactor northwest of Tokyo — its first since the 2011 Fukushima disaster — due to a control-rod alarm failure.

The Kashiwazaki-Kariwa nuclear complex in Niigata Prefecture was initially set to restart on Tuesday, but an alarm designed to sound when two non-paired control rods are withdrawn from the reactor fuel core failed to trigger during a test Saturday, the utility said at a press conference.

The company said it will announce a new date for restarting the No. 6 unit of the nuclear power complex.

After the latest incident, which was deemed a deviation from operational limits stipulated in the plant’s safety regulations, TEPCO returned all control rods to the fully inserted position.

The cause of the error was determined to be an incorrect control rod pairing that had persisted since the No. 6 unit began commercial operation in November 1996.

According to TEPCO, investigations since Saturday revealed that 88 of approximately 20,000 control rod pairs had configuration errors. The incorrect pairings had not been discovered until now because alarm tests are conducted at random.

Yutaka Kikukawa, unit director at the Kashiwazaki-Kariwa plant, denied that any mistakes were made by operational staff, saying, “We will do what needs to be done to correct the error discovered by chance.”

The configuration errors have since been corrected, and the plant was returned to its pre-deviation state Sunday night, TEPCO said.

The rescheduling came as it will take several days for the operator to conduct verification checks on each of the 205 control rods at the No. 6 reactor and examine the fission reaction of the fuel assemblies.

The reactors at the seven-unit complex have been offline since the No. 6 unit entered regular inspection in March 2012.

January 20, 2026 Posted by | Japan, safety | Leave a comment

Chubu Electric to Face On-Site Probe over N-Plant Data Fraud

Tokyo, Jan. 14 (Jiji Press) https://jen.jiji.com/jc/eng?g=eco&k=2026011400579—

Japan’s Nuclear Regulation Authority decided Wednesday that its secretariat will conduct an on-site inspection of Chubu Electric Power Co. over the company’s data fraud regarding earthquake risks at its Hamaoka nuclear power plant.
   The inspection is expected to target Chubu Electric’s headquarters in the central Japan city of Nagoya. The power plant located in the central prefecture of Shizuoka may be subject to the probe if necessary.


   Also at the day’s regular meeting, the nuclear watchdog approved the scrapping of its screening of the power plant for a possible restart, in the wake of the data scandal.
   In addition, the NRA will issue an order for Chubu Electric to report back on the details of the data fraud under the nuclear reactor regulation law, with the deadline set for the end of March. The company will face punishment if it refuses the order or makes false statements.
   The authority plans to urge other power companies to prepare appropriate documents for the NRA’s reactor screenings.

January 18, 2026 Posted by | Japan, safety | Leave a comment

Chubu Electric’s data fraud ‘undermines’ Japan’s nuclear energy policy

10 Jan 2026 https://www.japantimes.co.jp/news/2026/01/10/japan/chubu-electric-data-fraud/

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.

The new basic energy plan of the government, adopted in February 2025, marked a shift from its policy of reducing dependence on nuclear power as much as possible, which was introduced following the March 2011 triple meltdown at Tokyo Electric Power Company Holdings’ tsunami-stricken Fukushima No. 1 nuclear power plant.

The plan instead calls for fully utilizing nuclear energy to meet surging electricity demand in the country. It specifically seeks to raise the share of nuclear power in the energy mix to about 20% by fiscal 2040 from the current level of slightly less than 10%. For this to be achieved, the number of active nuclear power reactors should be increased from the current 14 to more than 30.

Late last year, the process to obtain local consent was completed for the restart of reactors at Tepco’s Kashiwazaki-Kariwa nuclear power station in Niigata Prefecture and Hokkaido Electric Power’s Tomari plant in Hokkaido.

On Jan. 20, the Kashiwazaki-Kariwa plant’s No. 6 reactor is expected to become the first Tepco reactor to be brought back online since the 2011 disaster.

Yamanaka said that the NRA does not plan to investigate nuclear power plants other than the Hamaoka power station for data fraud similar to the irregularities found at the Chubu Electric plant.

If public trust in safety is eroded, however, securing local consent for future reactor restarts would become increasingly difficult.

Chubu Electric’s data fraud case “will greatly undermine public trust in safety,” industry minister Ryosei Akazawa told a news conference Friday. “This should not have happened.” He vowed to “take strict measures” against Chubu Electric based on its upcoming report on preventive steps.

If the safety screening of the Hamaoka reactors restarts from scratch, the power supplier’s earnings will be affected significantly.

The company expects that its profitability will improve by about ¥250 billion a year if the Nos. 3 to 5 reactors at the Hamaoka plant are brought back online. The Nos. 1 and 2 reactors at the plant ended operations in January 2009 and are now being decommissioned.

At a news conference Monday, Chubu Electric President Kingo Hayashi said, “The company’s responsibility for the data fraud is serious.”

On whether he will step down from his post, Hayashi said only that he will consider the matter “comprehensively.”

Hayashi also serves as chairman of the Federation of Electric Power Companies of Japan.

Chubu Electric is also expected to struggle in its decarbonization efforts after the company decided last year to withdraw from a project to construct wind power plants at a total of three locations off the coasts of Akita and Chiba prefectures.

January 16, 2026 Posted by | Japan, secrets,lies and civil liberties | Leave a comment

Hiroshima, Nagasaki urge Japanese government to uphold non-nuclear principles

10-Jan-2026 CGTN. https://news.cgtn.com/news/2026-01-10/Hiroshima-Nagasaki-call-on-Japan-to-uphold-non-nuclear-principles-1JOBGW72YxO/p.html

The city assemblies of Hiroshima and Nagasaki have adopted statements urging the Japanese government to adhere to the country’s Three Non-Nuclear Principles, Kyodo News reported.

The Hiroshima City Assembly unanimously adopted its statement on Friday, pointing out that the ruling party’s attempt to revise the non-nuclear principles has caused concern, and strongly urging the Japanese government to take the feelings of people in the atomic-bombed cities seriously and to uphold the Three Non-Nuclear Principles, the report said.

The Nagasaki City Assembly passed its statement on Thursday by a majority vote, noting that successive Japanese governments have regarded the Three Non-Nuclear Principles as a national policy. It said the ruling party’s intended revision of the principles while amending the country’s security documents is totally unacceptable.

On August 6 and 9, 1945, in an effort to force Japan, which had launched a war of aggression, to surrender as soon as possible, the U.S. military dropped atomic bombs on Hiroshima and Nagasaki, respectively. The Three Non-Nuclear Principles – not possessing, not producing, and not allowing the introduction of nuclear weapons into Japanese territory – were first declared by then-Japanese Prime Minister Eisaku Sato in 1967 and formally adopted by parliament in 1971, establishing them as Japan’s basic nuclear policy. The National Security Strategy, one of the three documents approved by the Cabinet in 2022, states, “The basic policy of adhering to the Three Non-Nuclear Principles will remain unchanged in the future.”

Japanese media have previously reported that Prime Minister Sanae Takaichi is considering reviewing the third of the Three Non-Nuclear Principles, which prohibits nuclear weapons from entering Japan’s territory, when updating related documents.

January 12, 2026 Posted by | Japan, politics | Leave a comment

Japan’s ‘most dangerous’ nuclear power plant admits to manipulating earthquake safety data

Regulator halts review to restart Hamaoka power plant after 14 years

Shweta Sharma, Tuesday 06 January 2026, https://www.independent.co.uk/asia/japan/japan-nuclear-plant-data-manipulation-earthquake-b2895086.html

A Japanese power plant operator has admitted to cherry-picking critical safety data to pass the screening process of the nuclear safety regulator to restart two of its offline reactors.

Chubu Electric said on Monday that it had set up an independent panel of experts to investigate possible misconduct in compiling data as part of a process to restart two reactors at the Hamaoka nuclear power plant.

The plant originally had five reactors but two were permanently shut down in 2009. The remaining three reactors were taken offline in the wake of the 2011 Fukushima disaster.

Concerns about data manipulation mean the power plant is unlikely to restart anytime soon. It’s also a likely setback for Japan’s efforts to shift back to nuclear power to boost energy security and cut greenhouse gas emissions.

Chubu told regulators it had selected an earthquake wave model closest to the average of 20 possible patterns to calculate the Hamaoka plant’s “standard seismic motion”, the maximum shaking the reactors could withstand. However, the company admitted, employees in charge could have deliberately chosen that model to make the plant appear safer and speed up the screening process.

We sincerely apologise for the incident,” Chubu Electric president Kingo Hayashi told a press conference. “The actions could potentially shake the foundations of the nuclear power business.”

The regulator learned about the misconduct last February after it was contacted by a whistleblower.

A senior agency executive called the matter “unbelievable” saying it broke trust in the operator and would make the people question its eligibility.

The industry ministry has now ordered Chubu Electric to submit a detailed report by 6 April explaining the cause of the misconduct and outlining measures to prevent it from happening again.

The Hamaoka power plant, 200km south-west of Tokyo, has been described as the “world’s most dangerous” nuclear power facility by some seismologists and anti‑nuclear campaigners. Government forecasts have predicted an 87 per cent chance of a powerful quake in the area, which sits on two major subterranean faults. A major accident would be likely to force the evacuation of Greater Tokyo, home to 28 million people.

Professor Katsuhiko Ishibashi, a seismologist and a former member of a Japanese government panel on nuclear reactor safety, said in 2003 that Hamaoka was “the most dangerous nuclear power station” in Japan because of the potential for an earthquake to trigger a nuclear disaster.

He assessed at the time that such an incident would devastate a broad area between Tokyo and Nagoya, destroying more than 200,000 buildings and resulting in a huge tsunami.

The plant was ordered to shut down reactors 4 and 5 and cancel the planned restart of reactor 3 following the Fukushima disaster, when a magnitude 9 earthquake triggered tsunami waves up to 15m high. Hamaoka was built to withstand only an 8.5-magnitude quake and an 8m tsunami.

Chubu applied for a review to restart the Hamaoka reactors between 2014 and 2015, and it was approved for standard seismic motion in September 2023.

Shares of Chubu Electric dropped 8.2 per cent, its steepest fall since April 2025, after the latest revelations.

January 9, 2026 Posted by | Japan, safety | Leave a comment

Why talk of a Japanese nuclear option is resurfacing – and why it alarms critics

Conservatives are calling for a rethink of nuclear taboos, while critics warn of risks to the global non-proliferation regime

Julian Ryall, SCMP,3 Jan 2026

An editorial in the Sankei Shimbun has reopened a long-taboo debate in Japan over whether the country should even discuss acquiring nuclear weapons, after off-the-record remarks by a senior security official arguing the country should have them sparked domestic and regional backlash.

The conservative daily argued that growing threats from Japan’s neighbours mean no option for protecting the public should be beyond discussion, a stance that has drawn praise from some on the right and alarm from critics who warn that even signalling such intent could destabilise the global non-proliferation system.

The editorial, published on Monday, was accompanied by a graphic comparing regional nuclear forces, stating that Russia has an estimated 5,580 nuclear warheads, North Korea around 50 and China about 500, with the latter figure projected to rise to more than 1,000 by 2030.

It appeared 10 days after the senior national security official in the Prime Minister’s Office said – in an off-the-record remark reported by Japanese media during a background briefing – that he personally believed Japan should possess nuclear weapons.

The remarks prompted a fierce reaction at home and abroad, including from Beijing, where Guo Jiakun, a spokesperson for China’s foreign ministry, told reporters the situation was a “serious issue that exposes the dangerous attempts by some in Japan to breach international law and possess nuclear weapons”.

“China and the rest of the international community must stay on high alert and express grave concern,” he added.

Japan has for decades adhered to its three non-nuclear principles – not possessing, producing or permitting the introduction of nuclear weapons – while relying on the United States for extended deterrence and is a signatory to the Nuclear Non-Proliferation Treaty (NPT), which commits non-nuclear states to forgo developing or acquiring nuclear arms.

The Sankei editorial urged Prime Minister Sanae Takaichi not to “give in” to calls for the aide to be dismissed, arguing that doing so would “stifle free debate on how best to protect the Japanese people”.

It dismissed objections from China and North Korea as “ludicrous” and “hypocritical”, noting that both possessed nuclear weapons and were strengthening their arsenals.

“For Japan, the point of the debate is how to safeguard the public, not merely whether or not to actually possess nuclear weapons,” it added. “From that standpoint, making it taboo to merely mention the nuclear weapons option is the worst possible stance to adopt.”………………………………………………………………………………………………………………………. https://www.scmp.com/week-asia/politics/article/3338570/why-talk-japanese-nuclear-option-resurfacing-and-why-it-alarms-critics

January 4, 2026 Posted by | Japan, weapons and war | Leave a comment

Safety fears as Japan prepares to restart nuclear plant ‘built on tofu’

the greatest risk remains the region’s susceptibility to seismic activity.

the will of the majority of residents today is opposition to a restart and that opposition is f

While Fukushima operator Tepco says it is ‘committed to safety’ at Kashiwazaki-Kariwa, critics believe it is a disaster waiting to happen.

Julian Ryall, 27 Dec 2025

Campaigners against nuclear energy have condemned Japan’s decision to resume operations at the Kashiwazaki-Kariwa power plant, claiming that the facility will be unable to withstand a major earthquake as it was “built on tofu”.

Tokyo Electric Power Co (Tepco), the operator of the Niigata prefecture plant, on Wednesday applied for a final examination of the facility to the Nuclear Regulation Authority (NRA). Approval is likely to be a formality as the prefectural assembly already gave the nod on Tuesday.

Tepco, which has been fiercely criticised for its handling of the Fukushima Daiichi nuclear power plant disaster in March 2011, intends to restart one reactor at Kashiwazaki-Kariwa on January 20.

It would be the first of Tepco’s nuclear reactors to resume since three of Fukushima’s six reactors melted down after a magnitude 9 offshore earthquake unleashed devastating tsunamis.

Tepco has been working hard in recent years to convince the local government and residents of Niigata prefecture that it has made upgrades to secure the site from natural disasters.

Its president, Tomoaki Kobayakawa, told the media that as the operator “responsible” for the Fukushima accident, the company was now “committed to prioritising safety” at Kashiwazaki-Kariwa.

Many people remain unconvinced.

“The plant was famous for having been built on tofu – the bedrock is 30 metres (100 feet) below the surface – with many fault lines running through the site as well as offshore,” said Shaun Burnie, senior nuclear energy specialist for Greenpeace.

“Kashiwazaki-Kariwa is one of the world’s largest nuclear plants and the only one in theory capable of operating for Tepco. So restarting operations has been a priority for both the company and the government for more than a decade,” Burnie told This Week in Asia.

“But resistance from Niigata residents, the scale of safety issues and the incompetence of Tepco have undermined all efforts until now.”

History repeating itself?

Nearly 15 years after the Fukushima plant was the site of the second-worst nuclear accident in global history, Burnie warns that serious problems are being overlooked again.

Even during the preliminary planning stages, in the mid-1970s, it was apparent that ground conditions at the site by the Sea of Japan were not suitable, he said.

That was shown in July 2007, when the Chuetsu-oki earthquake struck. The magnitude 6.6 quake occurred on a previously unknown offshore fault line about 11km (7 miles) off the coast, followed 13 hours later by a 6.8 tremor around 330km (205 miles) to the west.

The nuclear plant, 19km (12 miles) due south from the epicentre of the initial quake, registered a peak ground acceleration – essentially how much the ground shook – of 6.8 metres (22 feet) per second squared in reactor No 1. The design specification for achieving a safe shutdown is 4.5m/s², while the restart level for key equipment in the plant is 2.73m/s².

Burnie said the original design specifications at the site “turned out to be gross underestimates”, with the quakes causing damage of varying degrees at 3,000 places within the plant.

A fire in an electric transformer caused the most serious damage. It left a pall of black smoke over the plant and alarmed local residents. There were also a number of leaks of mildly radioactive water and spills of radioactive cobalt-60, iodine and chromium-51 from overturned storage drums.

Given the events of 2007 and 2011, Burnie said local residents’ concerns were justified, particularly as new issues have come to light.

“We should have no confidence in Tepco assurances on safety at Kashiwazaki-Kariwa,” he said. “For example, two months after the NRA had approved the reactors’ basic safety assessment in late 2017, Tepco revealed that … the site under the emergency hydrogen ventilation buildings at units five, six and seven was vulnerable to liquefaction.”

Tepco “immediately came under pressure to explain the scale of liquefaction at the site, prove that it does not extend to the reactor buildings and how it was that the NRA was not informed prior to granting approval”, Burnie said.

Equally, he said, the NRA had to explain how it failed to identify liquefaction as a problem for a site before it granted basic safety approval.

A series of security incidents have also been cause for concern. There have been accusations of poor handling of sensitive documents, malfunctioning intruder detection systems and an employee borrowing a colleague’s pass to enter the restricted main control room in 2020.

Shaken by fears

But the greatest risk remains the region’s susceptibility to seismic activity.

“There are multiple seismic fault lines in the area of the Kashiwazaki-Kariwa site, including large-scale submarine active faults,” Burnie said. “The enormous seismic risks at the site remain unresolved and are certain to dominate the debate about the safety of any reactor restart, including in ongoing legal challenges.”

In a statement issued on Tuesday, Tepco said it would “carefully cooperate with all inspections performed by the NRA while also continuing to prioritise safety and steadily making each and every preparation for a restart”.

Takeshi Sakagami, a member of the Citizens’ Association for Monitoring Nuclear Regulation, said that a recent survey conducted by Niigata prefecture determined that 60 per cent of local residents believed that “conditions are not right” to resume operations at the plant.

“The governor explained that support should increase as understanding deepens,” Sakagami said. But “opponents counter that the will of the majority of residents today is opposition to a restart and that opposition is firm”.

Sakagami believed the government was hastening to restart the reactors “because they fear that Japan’s nuclear technology will fall behind the rest of the world”.

For him, the direction that Japan should take is simple.

“I believe Japan should abandon nuclear power and boldly shift towards renewable energy sources and energy conservation,” he said.

January 1, 2026 Posted by | Japan, safety | Leave a comment

Former Japanese PM Ishiba again criticizes remarks advocating nuclear armament.

Asia18:02, 27-Dec-2025. CGTN, https://news.cgtn.com/news/2025-12-27/Ex-Japan-PM-Ishiba-in-fresh-broadside-against-nuclear-armament-remarks-1JrH8p2oIaA/p.html

Former Japanese Prime Minister Shigeru Ishiba has again criticized recent remarks by a senior government official suggesting that Japan should possess nuclear weapons.

Speaking on a program aired Friday night by Japan’s BS11 television, Ishiba said that as the only country in the world to have suffered atomic bombings, Japan should take a clear stance on preventing nuclear proliferation and should not make statements that undermine that position.

On December 18, an anonymous senior official in charge of security at the Prime Minister’s Office told reporters that Japan should possess nuclear weapons. After the remarks were made public, they sparked widespread criticism and controversy within Japan.

Addressing the issue earlier, Ishiba said that if Japan were to acquire nuclear weapons, it would be forced to withdraw from the Treaty on the Non-Proliferation of Nuclear Weapons as well as the International Atomic Energy Agency. 

He stressed that such a move would render Japan’s nuclear energy policy – which underpins the country’s energy system – untenable, adding that “this would by no means be beneficial for Japan.”

According to a report on the online edition of the Japanese magazine Shukan Bunshun on December24, the official who made the remarks was Oue Sadamasa, a special advisor to Prime Minister Sanae Takaichi, whose portfolio includes nuclear disarmament and non-proliferation.

December 30, 2025 Posted by | 1 NUCLEAR ISSUES, Japan, politics | Leave a comment

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