Chubu Electric Executives Quit Over Hamaoka Nuclear Plant Earthquake Data Scandal
SCMP · 5 SOURCES1 day ago5 MIN

Summary
Chubu Electric Power announced the resignations of President Kingo Hayashi and Chairman Satoru Katsuno on Monday over a scandal involving falsified earthquake risk data for the Hamaoka nuclear plant in central Japan's Shizuoka Prefecture. The company will withdraw its applications to restart the Nos. 3 and 4 reactors, and Director Minoru Itō will take over as president on October 1. An independent investigation found that management pressure over delayed regulatory reviews created an environment conducive to data manipulation .
Key Points
- President Kingo Hayashi (林欣吾) and Chairman Satoru Katsuno (勝野哲) announced their resignations on Monday, accepting responsibility for the seismic data falsification scandal
- Chubu Electric will withdraw applications to restart the Nos. 3 and 4 reactors at the Hamaoka nuclear plant in Shizuoka Prefecture
- An independent panel's 250-page report released Monday found that management reprimands over restart delays created undue pressure on staff, contributing to the misconduct
- The data falsification began around 2012 and continued while Chairman Katsuno served as president from 2015 to 2020
- Internal whistle-blower reports were filed in 2019 and 2021 but were not handled appropriately by the company
Why It Matters
The scandal strikes at a sensitive time for Japan's nuclear energy policy, as the country seeks to revive nuclear power 15 years after the 2011 Fukushima disaster. The Hamaoka plant sits above the Nankai Trough fault zone, considered vulnerable to a potential "megaquake," making accurate seismic assessment critical for public safety . The resignation of top executives and withdrawal of restart applications signal that Japan must strengthen compliance frameworks if it hopes to meet its nuclear revival targets.
The scandal strikes at a sensitive time for Japan's nuclear energy policy, as the country seeks to revive nuclear power 15 years after the 2011 Fukushima disaster. The Hamaoka plant sits above the Nankai Trough fault zone, considered vulnerable to a potential "megaquake," making accurate seismic assessment critical for public safety . The resignation of top executives and withdrawal of restart applications signal that Japan must strengthen compliance frameworks if it hopes to meet its nuclear revival targets.