Takahama 3 is an 830 MWe (net) Kansai Electric PWR using MOX fuel. It restarted in January 2016, was idled by a court injunction from March 2016 to 2017, and has operated since; it entered a periodic inspection in April 2026.
Background: Palisades fuel loading: Holtec restart timeline and what comes next · NRC reactor licensing process, explained
Current state
| Status | Restarted |
| Country | Japan |
| Location | Takahama, Fukui Prefecture |
| Plant | Takahama |
| Unit | 3 |
| Operator | Kansai Electric Power |
| Reactor type | PWR |
| Net capacity (MWe) | 830 |
| Restart type | Post-Fukushima restart |
| Shut down | 2012-02-20 |
| Restarted | 2016-01-29 |
| Years offline | 3.9 |
| Regulator | NRA conformity approval 2015-02-12; beyond-40-year operation approved 2023-05-29 |
Notes
years offline uses the first restart (Jan 2016). Shutdown date from a 2012 Eco-Business report (search snippet); the injunction-driven offline period 2016-2017 is excluded from the figure.
Timeline
- 2012-02-20 — Takahama 3 was shut down for a periodic inspection and stayed offline after Fukushima. (source)
- 2015-02-12 — The NRA officially approved Takahama 3 and 4. (source)
- 2016-01-29 — Takahama 3 resumed operation. (source)
- 2016-03-09 — The Otsu District Court issued an injunction that forced the unit offline. (source)
- 2017-06-06 — Kansai restarted Takahama 3 after the Osaka High Court lifted the injunction. (source)
- 2023-05-29 — The NRA approved operation beyond 40 years. (source)
- 2026-04-07 — Takahama 3 was shut down for a periodic inspection. (source)
The timeline is append-only: corrections are added as new entries. Stated targets appear in the current-state table, never as milestones.
Related units
- Genkai Unit 3 Restarted · Japan
- Genkai Unit 4 Restarted · Japan
- Hamaoka Unit 3 Cancelled · Japan
- Hamaoka Unit 4 Cancelled · Japan
- Higashidori Unit 1 (Tohoku Electric) Under review · Japan
- Ikata Unit 3 Restarted · Japan
- Kashiwazaki-Kariwa Unit 6 Restarted · Japan
- Kashiwazaki-Kariwa Unit 7 Approved · Japan
See all 45 units in the Nuclear Plant Restarts Tracker →
Sources
- Current Status of Nuclear Power Plants in Japan as of August 7, 2026 — Japan Atomic Industrial Forum (JAIF) (primary), checked 2026-10-11
- Nuclear Power in Japan — World Nuclear Association, checked 2026-10-11
- Japan puts fifth reactor back into operation — World Nuclear News, checked 2026-10-11
- Nuclear plant shutdowns taking heavy toll on local economy — Eco-Business, checked 2026-10-11