Takahama nuclear power plant
Takahama nuclear power plant is a nuclear power station in Japan with 4 operating units totalling 3,392 MW gross. The site has 4 units on record in total.
Units
| Unit | Status | Type | Model | Gross MW | Online |
|---|---|---|---|---|---|
| Unit 1 | PWR | M (3-loop) | 826 | 1974 | |
| Unit 2 | PWR | M (3-loop) | 826 | 1975 | |
| Unit 3 | PWR | M (3-loop) | 870 | 1985 | |
| Unit 4 | PWR | M (3-loop) | 870 | 1985 |
Unit by unit
Each unit's rating, type and milestone dates as recorded by the Global Nuclear Power Tracker, with any correction we made to it. A dash or "not disclosed" means the source does not give the value.
Takahama nuclear power plant 1
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | Mitsubishi 3-loop |
| Size class | Large |
| Gross capacity | 826MW |
| Net capacity | 780MW |
| Thermal output | 2,440MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Mitsubishi Heavy Industries |
| Owner | Kansai Electric Power Co100% |
| Operator | Kansai Electric Power |
| Construction start | 25 Apr 1970 |
|---|---|
| First criticality | 14 Mar 1974 |
| Grid connection | 27 Mar 1974 |
| Commercial operation | 14 Nov 1974 |
Takahama nuclear power plant 2
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | Mitsubishi 3-loop |
| Size class | Large |
| Gross capacity | 826MW |
| Net capacity | 780MW |
| Thermal output | 2,440MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Mitsubishi Heavy Industries |
| Owner | Kansai Electric Power Co100% |
| Operator | Kansai Electric Power |
| Construction start | 9 Mar 1971 |
|---|---|
| First criticality | 20 Dec 1974 |
| Grid connection | 17 Jan 1975 |
| Commercial operation | 14 Nov 1975 |
Takahama nuclear power plant 3
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | Mitsubishi 3-loop |
| Size class | Large |
| Gross capacity | 870MW |
| Net capacity | 830MW |
| Thermal output | 2,660MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Mitsubishi Heavy Industries |
| Owner | Kansai Electric Power Co100% |
| Operator | Kansai Electric Power |
| Construction start | 12 Dec 1980 |
|---|---|
| First criticality | 17 Apr 1984 |
| Grid connection | 9 May 1984 |
| Commercial operation | 17 Jan 1985 |
Takahama nuclear power plant 4
| Reactor type | Pressurised water reactor (PWR) |
|---|---|
| Model | Mitsubishi 3-loop |
| Size class | Large |
| Gross capacity | 870MW |
| Net capacity | 830MW |
| Thermal output | 2,660MWt |
| Enrichment | 3–5% U-235 |
| NSSS vendor | Mitsubishi Heavy Industries |
| Owner | Kansai Electric Power Co100% |
| Operator | Kansai Electric Power |
| Construction start | 19 Mar 1981 |
|---|---|
| First criticality | 11 Oct 1984 |
| Grid connection | 1 Nov 1984 |
| Commercial operation | 5 Jun 1985 |
Takahama nuclear power plant in context
By gross operating capacity Takahama nuclear power plant is the 1st largest of 9 operating nuclear sites in Japan, holding 23% of the country's operating capacity, and ranks 36th of 172 worldwide.
Its operating units started up between 1974 and 1985; the median unit is 46.0 years old, older than the median of 35.0 in Japan.
The 4 units with both construction and grid dates on record took 3.4 to 3.9 years (median 3.7) from construction start to grid connection; the median across all reactors connected in the 1980s is 7.3 years.
The nearest other tracked nuclear sites are Ohi nuclear power plant (14 km), Mihama nuclear power plant (46 km) and Shimane nuclear power plant (227 km).
Build time by unit
| Unit | Construction start | Grid connection | Years | Fleet median, same decade |
|---|---|---|---|---|
| Unit 1 | 1970 | 1974 | 3.9 | 5.4 (1970s) |
| Unit 2 | 1971 | 1975 | 3.9 | 5.4 (1970s) |
| Unit 3 | 1980 | 1984 | 3.4 | 7.3 (1980s) |
| Unit 4 | 1981 | 1984 | 3.6 | 7.3 (1980s) |
Nearest tracked nuclear sites
| Site | Country | Distance | Operating GW gross |
|---|---|---|---|
| Ohi nuclear power plant | Japan | 14 km | 2.4 |
| Mihama nuclear power plant | Japan | 46 km | 0.8 |
| Shimane nuclear power plant | Japan | 227 km | 0.8 |
How these are worked out: ranks use gross operating capacity; ages count from the start-up year on record, as on the age page; build times run from construction start to grid connection, as on the build-times page; ratings are the tracker's net and design net capacity, as on the uprates page. Distances are straight-line between exact positions, so a site with only an approximate position gets none. A unit missing a date or a rating is left out of the figure that needs it.
Earthquakes nearby
Loading the latest USGS check…
| Time (UTC) | Mag | Depth | Epicentre | Distance |
|---|
Magnitude 4.0 and above within 200 km of Takahama nuclear power plant's listed coordinates, past 30 days. This is distance, not shaking: it says nothing about damage or any change in operation. Every plant.
| Location | Fukui, Japan |
|---|---|
| Coordinates | 35.5223, 135.5036 |
| Elevation | about 5 mabove sea level |
| Setting | On the sea coast, 0.6 km from the water |
| Region | Eastern Asia |
| Units by status | Operating: 4 |
Elevation is read at the listed coordinates from a 30 m terrain model (SRTM 30 m). Two independent models differ by a median of 6 m across our plants and by up to about 40 m on steep or coastal ground, and a point on a shoreline can read as sea level. Distance to the water is measured to a generalised 1:10 million coastline, so a few kilometres or less is not resolved. This is context, not a design-basis or flood-risk figure.
| Owners | Kansai Electric Power Co |
|---|---|
| Operators | Kansai Electric Power |
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Sources
- Global Nuclear Power Tracker, Global Energy Monitor, August 2026 release , CC BY 4.0 · retrieved 2026-09-06
- GEM.wiki entry (further reading) , CC BY-SA 4.0, linked, not quoted
How these sources are used, including the corrections applied on top of them and what is deliberately left blank · download the underlying data