positive OCCTO measured output on 2026-11-08 · not live
JAPAN NUCLEAR ASSET MAPEvery reactor.
Every reactor.
One evidence layer.
Operating snapshots, restart candidates, construction, decommissioning, legacy plans and active site studies—kept in distinct evidence categories.
72 entries combine separate portfolios: 33 existing commercial reactors, 27 JAIF closed-down entries, 3 under-construction units, 8 legacy planned units and 1 site study. This is a map coverage total—not a fleet denominator.
existing reactors, not operating claims
separate JAIF UC table
plus 1 fully decommissioned entry
Mihama successor · no design decision
JAIF PL table · no build dates
MASTER GEOGRAPHY
Filter the national reactor landscape
The default view shows every tracked layer. Turn categories on and off, then select a location to inspect its reactor-level evidence.
Every coloured circle represents one reactor entry, using the same unit-dot scale as Fleet Geography; mixed-status sites therefore remain mixed-colour. Unit numbers remain visible at rest, while hover, focus or click adds spacing for easier identification. Approximate coordinates over a Natural Earth coastline. Statuses are source-dated and are not presented as live unless explicitly identified as an operator snapshot.
33 is the commercial fleet denominator
Generating, temporarily not confirmed and restart-pipeline statuses are mutually exclusive views of the same 33 existing units.
JAIF fleet source ↗27 is a separate JAIF table
It includes ordinary commercial units, Fukushima Daiichi, two research/development reactors and one completed dismantlement.
JAIF closed-down source ↗Three units, separately classified
Ohma, TEPCO Higashidori 1 and Shimane 3 remain in JAIF's under-construction table; “TBD” is not a forecast.
JAIF construction source ↗Mihama is the strongest current signal
KEPCO is surveying for a successor unit and calls an advanced light-water reactor the realistic option. MHI's SRZ-1200 is a credible candidate, but no design or vendor has been selected.
KEPCO primary source ↗Eight dated plans—not forecasts
JAIF still lists eight planned units. Kaminoseki and Tsuruga preparation is suspended; no listed unit has a construction or operation date.
JAIF planned table ↗