Japanese utility execs resign over falsified quake safety data for 2 nuclear reactors

Live updates

1. 2d ago

   Chubu Electric Power execs resign amid nuclear reactor data scandal

   President Kingo Hayashi and Chairman Tetsu Katsuno resigned from Chubu Electric Power Company on September 30 after falsified earthquake safety data was discovered for units 3 and 4 at the Hamaoka nuclear power plant. The data manipulation affected seismic design standards. A civic group filed a criminal complaint alleging fraudulent obstruction of government business. New President Minoru Yasui vows to reform corporate culture and prevent data fraud recurrence.

   Why it matters

   The resignations and data scandal raise concerns about safety and regulatory compliance in Japan's nuclear industry. The Hamaoka plant's location in a seismically active region heightens the importance of accurate safety data. The scandal may impact public trust in the company and the industry as a whole.

   What is confirmed

   • President Kingo Hayashi and Chairman Tetsu Katsuno resigned from Chubu Electric Power Company on September 30.
   • The falsified data affected seismic design standards for units 3 and 4 at the Hamaoka nuclear power plant.
   • A civic group filed a criminal complaint with the Tokyo District Public Prosecutors Office alleging fraudulent obstruction of government business.
   • New President Minoru Yasui vows to reform corporate culture and prevent data fraud recurrence.

   What to watch next

   • Further developments in the investigation into data falsification
   • Actions taken by regulatory bodies in response to the scandal
   • Progress in implementing corporate culture reforms at Chubu Electric Power Company
   Sources used for this update (14)

   1. en.wikipedia.org — Japan - Wikipedia
   2. en.wikipedia.org — Japanese language - Wikipedia
   3. www.duolingo.com — Learn a language for free - Duolingo
   4. jepang.org — Learn Japanese Online for Free | Jepang.org
   5. www.tofugu.com — Learn Japanese: A Ridiculously Detailed Guide - Tofugu
   6. mochidemy.com — Learn Japanese online from zero for beginners - mochidemy.com
   7. www.wral.com — Business News and Reporting Coverage, page 18 | WRAL
   8. ja.wikipedia.org — 日本語 - Wikipedia
   9. jpnotes.app — JP Notes — Learn Japanese Free | JP Notes
   10. www.nippon.com — New Chubu Electric Chief Vows to Prevent Data Fraud ...
   11. sp.m.jiji.com — New Chubu Electric Chief Vows to Prevent Data Fraud ...
   12. mainichi.jp — 中部電新社長「経営層から意識変える」 浜岡原発不正で覚悟表明
   confidence 100%
2. 8d ago

   Chubu Electric executives resign after Hamaoka nuclear plant data falsification

   President Kingo Hayashi and Chairman Tetsu Katsuno resigned from Chubu Electric Power Company on September 30 following the discovery of manipulated earthquake safety data. The fraud affected the seismic design standards for units 3 and 4 at the Hamaoka nuclear power plant in Shizuoka Prefecture. A civic group has filed a criminal complaint with the Tokyo District Public Prosecutors Office, alleging the executives committed fraudulent obstruction of government business through an organized, long-term effort to deceive the Nuclear Regulation Authority during the restart review process.

   Why it matters

   The Hamaoka plant houses a facility called the Corridor of Learning from Failure to preserve lessons from past nuclear accidents. This internal focus on safety makes the systemic manipulation of seismic data a significant breach of regulatory trust. The investigation centers on whether the company intentionally misled government inspectors to accelerate the reactors' restart.

   What is confirmed

   • President Kingo Hayashi and Chairman Tetsu Katsuno resigned from Chubu Electric Power Company on September 30.
   • Chubu Electric manipulated standard ground motion data for seismic design at the Hamaoka nuclear power plant.
   • The falsified data concerned the safety reviews for units 3 and 4.
   • A civic group filed a criminal complaint with the Tokyo District Public Prosecutors Office.

   Still unconfirmed

   • The data manipulation was an organized effort carried out by many people over a long period.
   • Executives are suspected of fraudulent obstruction of government business.

   What to watch next

   • Decision by the Tokyo District Public Prosecutors Office on whether to open a formal criminal investigation.
   • Findings from the Nuclear Regulation Authority regarding the impact of the falsified data on reactor safety.
   Sources used for this update (3)

   1. www.yomiuri.co.jp — 中部電力 浜岡原発 データ不正 原子力規制委員会 科学コミュニケーシ...
   2. times.abema.tv — 原発データ不正 中部電力幹部を市民団体が告発 (Abema TIMES)
   3. www.shikoku-np.co.jp — 北陸電、資料ミス再発防止策報告／志賀原発2号機の再稼働審査 | 全国...
   confidence 90%
3. 10d ago

   Chubu Electric Leaders Exit Amid Hamaoka Nuclear Safety Fraud Case

   President Kingo Hayashi and Chairman Tetsu Katsuno resigned from Chubu Electric Power Company on September 30. Their departures follow a scandal involving falsified earthquake safety data for units 3 and 4 at the Hamaoka nuclear power plant in Shizuoka Prefecture. A civic group and researchers have since filed a criminal complaint with the Tokyo District Public Prosecutors Office. The group accuses executives of fraudulent obstruction of government business, alleging the data manipulation was an organized effort carried out by many people over a long period.

   Why it matters

   The Hamaoka plant requires strict safety reviews before it can restart operations. These assessments determine if the reactors can withstand seismic activity. Manipulation of this data undermines the regulatory process managed by the government.

   What is confirmed

   • President Kingo Hayashi and Chairman Tetsu Katsuno stepped down on September 30.
   • The scandal involves manipulated earthquake safety assessments for units 3 and 4 at the Hamaoka nuclear power plant in Omaezaki, Shizuoka Prefecture.
   • President Hayashi apologized in Nagoya on September 30, calling the situation the height of bitterness.

   Still unconfirmed

   • Attorney Hiroyuki Kawai claims the data manipulation was an organized effort involving many people over a long period.
   • Hokuriku Electric Power submitted explanations to the Nuclear Regulation Authority regarding over 200 errors in restart review documents for Shika Nuclear Power Plant Unit 2.

   What to watch next

   • Decision by the Tokyo District Public Prosecutors Office on whether to launch a formal criminal investigation.
   • Official response from the Nuclear Regulation Authority regarding the Hamaoka plant's safety certifications.
   Sources used for this update (2)

   1. news.tv-asahi.co.jp — 浜岡原発データ不正問題めぐり 中部電力会長らを告発 市民や研究者ら
   2. news.ntv.co.jp — 志賀原発2号機の再稼働審査資料に216か所の記載ミス問題 北陸電力 規...
   confidence 90%
4. 12d ago

   Chubu Electric Executives Resign Over Hamaoka Reactor Data

   Chubu Electric Power Company President Kingo Hayashi and Chairman Tetsu Katsuno stepped down effective September 30 following a data manipulation scandal concerning the earthquake safety assessments for the Hamaoka nuclear power plant. President Hayashi held a press conference in Nagoya on September 30, apologizing for the series of inappropriate incidents and describing the situation as the height of bitterness. Researchers filed a criminal complaint with the Tokyo District Public Prosecutors Office against Chubu Electric executives, accusing them of obstructing government review operations for units 3 and 4 located in Omaezaki, Shizuoka Prefecture.

   Why it matters

   The executive departures follow the release of an external investigative report on September 14 by lawyers detailing how calculation results far exceeding previous assumptions drove the utility to falsify seismic motion records. The scandal has derailed restart applications for reactors at the Hamaoka site, intensifying scrutiny over regulatory compliance within Japan's nuclear power sector.

   What is confirmed

   • Chubu Electric President Kingo Hayashi and Chairman Tetsu Katsuno are resigning effective September 30 over earthquake data manipulation for reactors 3 and 4 at the Hamaoka nuclear plant.
   • President Hayashi held a press conference in Nagoya on September 30, calling the situation the height of bitterness and apologizing for inappropriate incidents.
   • Researchers filed a criminal complaint with the Tokyo District Public Prosecutors Office on September 30 alleging that Chubu Electric executives obstructed the national screening process.
   • Chubu Electric released an external investigation report by lawyers on September 14 regarding the seismic motion data manipulation.

   What to watch next

   • Decisions by the Tokyo District Public Prosecutors Office regarding whether to accept the criminal complaint against Chubu Electric executives.
   • Further actions by regulatory authorities concerning safety oversight at the Hamaoka nuclear power plant.
   Sources used for this update (6)

   1. www.japantimes.co.jp — Tag - The Japan Times
   2. mainichi.jp — 中部電力・林社長が辞任会見「痛恨の極み」 浜岡原発データ不正
   3. news.yahoo.co.jp — 内外の指摘を「無視」、固執した原発再稼働 検証・中部電データ不正（...
   4. news.ntv.co.jp — 浜岡原発データ不正問題 東京地検に刑事告発 研究者ら（2026年9月30日...
   5. jbpress.ismedia.jp — 中部電力社長が自ら選んだ「隠蔽リスク」、浜岡原発のデータ不正はな...
   6. www.marketscreener.com — News Chubu Electric Power Company, Incorporated
   confidence 100%
5. 14d ago

   Chubu Electric execs resign amid nuclear reactor data scandal

   Chubu Electric Power Company executives are stepping down after a scandal involving falsified earthquake safety data for two nuclear reactors at the Hamaoka plant. The company has withdrawn its applications to restart the reactors. The move follows a report from an external investigation committee finding data manipulation. The resignations and withdrawal highlight ongoing scrutiny over regulatory compliance in Japan's nuclear power sector.

   Why it matters

   Japan's nuclear power sector faces continued scrutiny over safety and regulatory compliance as utilities seek to restart idled facilities. The Hamaoka plant scandal is the latest in a series of incidents raising concerns about data integrity and safety culture within the industry. The incident has led to a leadership shake-up at Chubu Electric Power Company. The company's actions reflect the high stakes involved in ensuring public trust and regulatory approval.

   What is confirmed

   • Chubu Electric Power Company withdrew applications to restart two reactors at its Hamaoka nuclear power plant on September 25.
   • The withdrawal followed a report from an external investigation committee finding data manipulation.
   • The company cited the report's findings in deciding to withdraw the applications.

   What to watch next

   • Further developments in the investigation into data manipulation at Chubu Electric Power Company
   • Regulatory responses from the Japanese nuclear authority
   • Impact on the restart plans for other idled nuclear reactors in Japan
   Sources used for this update (5)

   1. www.asahi.com — Chubu Electric drops reactor restart bid amid data scandal
   2. www.nippon.com — Chubu Electric Withdraws N-Reactor Restart Screening ...
   3. www.sankei.com — 中部電がデータ不正で浜岡原発審査申請取り下げ 廃炉費改竄は新たに4...
   4. english.kyodonews.net — Chubu Electric withdraws application for Hamaoka nuclear ...
   5. www.daily.co.jp — 浜岡原発「二重に不正している」/主要/社会総合/デイリースポーツ onl...
   confidence 90%
6. 28d ago

   Chubu Electric Leaders Resign Over Quake Data

   The president and chairman of Chubu Electric Power Company are stepping down following a scandal involving manipulated earthquake safety data at two nuclear reactors. The executive departures forced the Japanese utility to withdraw its pending restart applications for the Hamaoka nuclear plant units. Safety concerns triggered the halt and the subsequent leadership shake-up. The scandal highlights ongoing scrutiny over regulatory compliance and data integrity within Japan's nuclear power sector as utilities attempt to bring idled atomic facilities back online.

   Why it matters

   Japanese utilities face strict oversight when seeking permission to reactivate nuclear generators idled in the wake of past energy crises. Any falsification of safety data severely damages public trust and halts corporate timelines for returning reactors to commercial operation. Leadership accountability in this instance underscores the high stakes surrounding seismic safety margins in a seismically active nation.

   What is confirmed

   • Chubu Electric Power Company President Kingo Hayashi and Chairperson Satoru Katsuno are resigning over manipulated earthquake safety data for two reactors.
   • The data manipulation scandal led Chubu Electric to withdraw its restart applications for the Hamaoka nuclear plant units.

   What to watch next

   • Further regulatory investigations by Japanese nuclear authorities into the extent of the data falsification.
   • Potential announcements regarding replacement leadership at Chubu Electric Power Company.
   Sources used for this update (9)

   1. www.sandiegouniontribune.com — San Diego Union-Tribune
   2. AP News — Japanese utility execs resign over falsified quake safety data for 2 nuclear reactors
   3. Financial Times — Japanese utility halts nuclear reactor restart after data manipulation scandal
   4. World Nuclear News — Chubu withdraws restart applications for Hamaoka units
   5. Yahoo — President, chairman of Japan's Chubu Electric step down over data manipulation
   6. Nikkei Asia — Shake-up at Japan nuclear plant operator after quake data scandal
   7. japantimes.co.jp — Top Chubu Electric executives resign over nuclear plant data scandal
   8. Reuters — Chubu says its president to resign, nuclear restart application withdrawn over data scandal
   9. www.power-eng.com — Japanese utility execs resign over falsified quake safety data for 2 nuclear reactors
   confidence 100%