Higashidori Unit 1 (Tohoku Electric)

Higashidori 1 is Tohoku Electric's 1,067 MWe (net) BWR, offline since February 2011. It applied for NRA review in June 2014, but the review of site faults, ground motion and tsunami has dragged on and the completion date of safety works is undecided.

Background: Palisades fuel loading: Holtec restart timeline and what comes next · NRC reactor licensing process, explained

Current state

Notes

Distinct from TEPCO's Higashidori 1 ABWR, which is an unfinished new build (out of scope). WNN 2017 date: article published 8 Feb 2017 says Tohoku announced 'yesterday'.

Timeline

• 2011-02-06 — Higashidori 1 entered an outage. (source)
• 2014-06-10 — Tohoku applied for the NRA conformity review. (source)
• 2017-02-07 — Tohoku pushed back the safety-upgrade schedule, citing slow fault evaluation. (source)
• 2024 — Tohoku said completion of reinforcement work, previously aimed for FY2024, was now undetermined. (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
• Ikata Unit 3 Restarted · Japan
• Kashiwazaki-Kariwa Unit 6 Restarted · Japan
• Kashiwazaki-Kariwa Unit 7 Approved · Japan
• Mihama Unit 3 Restarted · Japan

See all 45 units in the Nuclear Plant Restarts Tracker →

Sources

1. Current Status of Nuclear Power Plants in Japan as of August 7, 2026 — Japan Atomic Industrial Forum (JAIF) (primary), checked 2026-10-11
2. Nuclear Power in Japan — World Nuclear Association, checked 2026-10-11
3. Delay to safety upgrades at Tohoku units — World Nuclear News, checked 2026-10-11
4. Japan's Higashidori No.1 reactor faces further delays — Argus Media, checked 2026-10-11