TOKYO — Japan’s nuclear recovery efforts hit a major roadblock on Wednesday, January 14, 2026, as the Nuclear Regulation Authority (NRA) officially suspended the safety review for the Hamaoka Nuclear Power Plant. The move follows a shocking admission from Chubu Electric Power that it fabricated seismic data to underestimate earthquake risks—a betrayal that NRA Chairman Shinsuke Yamanaka described as “misconduct” that effectively sends the 10-year review process back to “square one.”
1. The Whistleblower and the Fabrication
The scandal surfaced after an internal whistleblower tipped off the regulator in February 2025, alleging that Chubu Electric had spent years manipulating seismic projections.
- The “Cherry-Picking” Method: Chubu Electric admitted to using a “deliberately misleading method” to select seismic waves. Out of 20 sets of ground motions calculated, employees reportedly hand-picked the most favorable data to ensure the plant met safety standards for its No. 3 and No. 4 reactors.
- The Risk Factor: The Hamaoka plant is situated in Shizuoka Prefecture, directly above the focal zone of the Nankai Trough, where experts predict a 60–90% chance of a megaquake within the next 30 years.
- The Regulator’s Stand: The NRA has issued a formal reporting order, giving the utility until March 31, 2026, to explain the root cause. On-site inspections are imminent.
2. Financial and Strategic Fallout
For Chubu Electric, the Hamaoka restart was the cornerstone of its long-term business plan. The suspension is expected to have massive economic ripples:
| Impact Area | Details |
| Procurement Costs | A restart would have saved ¥260 billion ($1.8 billion) annually in fossil fuel costs. |
| Stock Market | Chubu Electric shares plummeted nearly 10%—the largest drop in 13 years—following the news. |
| Review Timeline | Originally targeting a 2030 restart, the process may now be scrapped entirely or rejected. |
3. The Political Tensions: Takaichi’s Nuclear Push
The scandal creates a significant headache for Prime Minister Sanae Takaichi. Since taking office in late 2025, Takaichi has aggressively campaigned for nuclear restarts to achieve 100% energy self-sufficiency and counter the high cost of imported LNG and coal, which still provide 60–70% of Japan’s power.
While the Hamaoka review is stalled, other projects are moving forward:
- TEPCO’s Kashiwazaki-Kariwa: Scheduled to turn on its first reactor later this month—the first TEPCO restart since the 2011 Fukushima disaster.
- Current Fleet Status: Of Japan’s 33 operable reactors, only 14 are currently back online.
The Hamaoka data fraud threatens to undo years of government effort to rebuild public trust, reminding the nation of the “safety myth” culture that led to the Fukushima meltdown.