⚡ PowerLimit Data Map

Japan nuclear & power projects

299 tracked · by stage: Under review 145 · Operating 118 · EDA 12 · Construction 9 · MOU 6 · In operation 4 · updated 2026-09-08

Leading projects (top 15 by stage)

ProjectStageTechnologySource
Takahama Nuclear Power Plant Unit 1, Fukui Prefecture
Kansai Electric plans to restart Takahama Unit 1 (780MWe PWR) for commercial operation by late August after ov
In operationLarge reactor (PWR)📎 World Nuclear News
Mutsu, Aomori Prefecture
Japan's First Off-Site Dry Cask Spent Fuel Storage Facility Receives NRA Operating License, Stores for up to 5
In operationSpent Nuclear Fuel Dry Interim Storage Facility📎 World Nuclear News
Fukui Prefecture's Mihama and Takahama Nuclear Power Plants
Kansai Electric completes containment reinforcement, seismic, and fire protection upgrades for Mihama Unit 3 a
In operationLarge reactor (PWR)📎 World Nuclear News
Oarai, Ibaraki
JAEA's HTTR Restarts July 30, 2021, Plans Hydrogen Production Link
In operationHigh-temperature gas reactor (HTGR)📎 World Nuclear News
Ikata
52 Unused Ikata 1, 2 Fuel Assemblies Reassembled by UK Springfields Fuels for Ikata 3 Use
OperatingLarge reactor📎 Power Limited DB
Kashiwazaki-Kariwa
Control rod alarm fixed, restart initiated, targeting March 18 commercial operation
OperatingRestart📎 Power Limited DB
Kashiwazaki-Kariwa
Unit 6 Restarted Jan 21, Halted by Control Rod Withdrawal Alarm, Aiming for Feb 9 Restart
OperatingRestart📎 Power Limited DB
Kashiwazaki-Kariwa
Unit 6 Targets Grid Connection Jan 2026, Commercial Operation Mar 2026
OperatingRestart📎 Power Limited DB
Kashiwazaki-Kariwa
Units 6 & 7 Restart Approved, 100 Billion Yen Local Investment Pledged Over 10 Years
OperatingRestart📎 Power Limited DB
Mihama
Mihama Unit 3 (826MW PWR) restarts June 23, full power by July 27
OperatingRestart📎 Power Limited DB
UK: New Nuclear Market / Japan: Fukushima Decommissioning & Processing
Operation/Plan/Announcement/Approval: 2012
OperatingRestart📎 Power Limited DB
Japan (National)
Operation/Plan/Approval/Restart: 2012
OperatingRestart📎 Power Limited DB
Japan (National)
Launch/Announcement: 2012, 2006, October 2010
OperatingLarge reactor📎 Power Limited DB
Shimane
BWR 789MW to Restart in December, Commercial Operation Expected January 2025
ConstructionRestart📎 Power Limited DB
Tokai
Preliminary Safety Facility Completion Delayed to Sep 2024, Awaiting Court Ruling Post-Continued Operation App
ConstructionRestart📎 Power Limited DB
🔒 The full list of 299, per-project timelines, source links to news and filings, next checkpoints and PowerLimit’s reading are for members.
Full records, analysis and source links are for members.
News, filings and regulatory documents collected since 2020 — with PowerLimit’s reading of them — are available on the interactive map and through YouTube membership.