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nuclear•chain

Nuclear power in Japan

Japan operates 15 nuclear power reactors across 27 sites, with 14.6 GW of gross capacity. A further 5 units are under construction, adding 6.1 GW. 27 units have been retired.

Operating
15
14.6 GW gross
Under construction
5
6.1 GW
Planned
0
incl. 0 announced
Retired
27
10 cancelled

Operating fleet by type: PWR (12), BWR (3). Principal operators: Kansai Electric Power, Kyushu Electric Power, Tokyo Electric Power.

Position in the fuel chain

FacilityStageOperatorCapacity / output
Rokkasho Enrichment Plant enrichment Japan Nuclear Fuel Limited not disclosed
Kurihama (GNF-J) fabrication Global Nuclear Fuel 630tHM/yr
Tokai-Mura (Mitsubishi Nuclear Fuel) fabrication Mitsubishi Heavy Industries 440tHM/yr
Kumatori (NFI) fabrication — 284tHM/yr
Tokai-Mura (NFI) fabrication — 250tHM/yr
Rokkasho Reprocessing Plant reprocessing Japan Nuclear Fuel Limited 800tHM/yr
Takahama nuclear power plant — Japan: 4 units, 3,392 MW Kashiwazaki Kariwa nuclear power plant — Japan: 2 units, 2,712 MW Genkai nuclear power plant — Japan: 2 units, 2,360 MW Ohi nuclear power plant — Japan: 2 units, 2,360 MW Shimane nuclear power plant — Japan: 2 units, 2,193 MW Sendai nuclear power plant — Japan: 2 units, 1,780 MW Ohma nuclear power plant — Japan: 1 unit, 1,383 MW Tokai nuclear power plant — Japan: 1 unit, 1,100 MW Tomari nuclear power plant — Japan: 1 unit, 912 MW Ikata nuclear power plant — Japan: 1 unit, 890 MW Mihama nuclear power plant — Japan: 1 unit, 826 MW Onagawa nuclear power plant — Japan: 1 unit, 825 MW
Operating 15Under construction 5 circle area ∝ site capacity Nuclear sites in Japan.

All units in Japan

UnitSiteStatusTypeGross MWOnline
Genkai nuclear power plant 3 Genkai nuclear power plant Operating PWR 1,180 1994
Genkai nuclear power plant 4 Genkai nuclear power plant Operating PWR 1,180 1997
Ikata nuclear power plant 3 Ikata nuclear power plant Operating PWR 890 1994
Kashiwazaki Kariwa nuclear power plant 6 Kashiwazaki Kariwa nuclear power plant Operating BWR 1,356 2026
Mihama nuclear power plant 3 Mihama nuclear power plant Operating PWR 826 1976
Ohi nuclear power plant 3 Ohi nuclear power plant Operating PWR 1,180 1991
Ohi nuclear power plant 4 Ohi nuclear power plant Operating PWR 1,180 1993
Onagawa nuclear power plant 2 Onagawa nuclear power plant Operating BWR 825 2024
Sendai nuclear power plant 1 Sendai nuclear power plant Operating PWR 890 1984
Sendai nuclear power plant 2 Sendai nuclear power plant Operating PWR 890 1985
Shimane nuclear power plant 2 Shimane nuclear power plant Operating BWR 820 2024
Takahama nuclear power plant 1 Takahama nuclear power plant Operating PWR 826 1974
Takahama nuclear power plant 2 Takahama nuclear power plant Operating PWR 826 1975
Takahama nuclear power plant 3 Takahama nuclear power plant Operating PWR 870 1985
Takahama nuclear power plant 4 Takahama nuclear power plant Operating PWR 870 1985
Kashiwazaki Kariwa nuclear power plant 7 Kashiwazaki Kariwa nuclear power plant Under construction BWR 1,356 2030
Ohma nuclear power plant 1 Ohma nuclear power plant Under construction BWR 1,383 2029
Shimane nuclear power plant 3 Shimane nuclear power plant Under construction BWR 1,373 —
Tokai nuclear power plant 2 Tokai nuclear power plant Under construction BWR 1,100 2026
Tomari nuclear power plant 3 Tomari nuclear power plant Under construction PWR 912 2027
Ashihama nuclear power plant 1 Ashihama nuclear power plant Cancelled — 1,300 —
Ashihama nuclear power plant 2 Ashihama nuclear power plant Cancelled — 1,300 —
Fugen nuclear power plant Fugen nuclear power plant Retired PHWR 165 1979
Fukushima Daiichi nuclear power plant 1 Fukushima Daiichi nuclear power plant Retired BWR 460 1971
Fukushima Daiichi nuclear power plant 2 Fukushima Daiichi nuclear power plant Retired BWR 784 1974
Fukushima Daiichi nuclear power plant 3 Fukushima Daiichi nuclear power plant Retired BWR 784 1976
Fukushima Daiichi nuclear power plant 4 Fukushima Daiichi nuclear power plant Retired BWR 784 1978
Fukushima Daiichi nuclear power plant 5 Fukushima Daiichi nuclear power plant Retired BWR 784 1978
Fukushima Daiichi nuclear power plant 6 Fukushima Daiichi nuclear power plant Retired BWR 1,100 1979
Fukushima Daiichi nuclear power plant 7 Fukushima Daiichi nuclear power plant Cancelled BWR 1,380 —
Fukushima Daiichi nuclear power plant 8 Fukushima Daiichi nuclear power plant Cancelled BWR 1,380 —
Fukushima Daini nuclear power plant 1 Fukushima Daini nuclear power plant Retired BWR 1,100 1982
Fukushima Daini nuclear power plant 2 Fukushima Daini nuclear power plant Retired BWR 1,100 1984
Fukushima Daini nuclear power plant 3 Fukushima Daini nuclear power plant Retired BWR 1,100 1985
Fukushima Daini nuclear power plant 4 Fukushima Daini nuclear power plant Retired BWR 1,100 1987
Genkai nuclear power plant 1 Genkai nuclear power plant Retired PWR 559 1975
Genkai nuclear power plant 2 Genkai nuclear power plant Retired PWR 559 1981
Hamaoka nuclear power plant 1 Hamaoka nuclear power plant Retired BWR 540 1976
Hamaoka nuclear power plant 2 Hamaoka nuclear power plant Retired BWR 840 1978
Hamaoka nuclear power plant 3 Hamaoka nuclear power plant Mothballed BWR 1,100 1987
Hamaoka nuclear power plant 4 Hamaoka nuclear power plant Mothballed BWR 1,137 1993
Hamaoka nuclear power plant 5 Hamaoka nuclear power plant Mothballed BWR 1,380 2005
Hamaoka nuclear power plant 6 Hamaoka nuclear power plant Shelved BWR 1,400 —
Higashidori (Tepco) nuclear power plant 1 Higashidori (Tepco) nuclear power plant Mothballed BWR 1,385 —
Higashidori (Tepco) nuclear power plant 2 Higashidori (Tepco) nuclear power plant Shelved BWR 1,385 —
Higashidori (Tohoku) nuclear power plant 1 Higashidori (Tohoku) nuclear power plant Mothballed BWR 1,100 2005
Higashidori (Tohoku) nuclear power plant 2 Higashidori (Tohoku) nuclear power plant Shelved BWR 1,385 —
Hohoku nuclear power plant 1 Hohoku nuclear power plant Cancelled BWR 1,067 —
Hohoku nuclear power plant 2 Hohoku nuclear power plant Cancelled BWR 1,067 —
Ikata nuclear power plant 1 Ikata nuclear power plant Retired PWR 566 1977
Ikata nuclear power plant 2 Ikata nuclear power plant Retired PWR 566 1982
Japan Power Demonstration Reactor nuclear power plant Japan Power Demonstration Reactor nuclear power plant Retired BWR 13 1965
Kaminoseki nuclear power plant 1 Kaminoseki nuclear power plant Shelved BWR 1,373 —
Kaminoseki nuclear power plant 2 Kaminoseki nuclear power plant Shelved BWR 1,373 —
Kashiwazaki Kariwa nuclear power plant 1 Kashiwazaki Kariwa nuclear power plant Mothballed BWR 1,100 1985
Kashiwazaki Kariwa nuclear power plant 2 Kashiwazaki Kariwa nuclear power plant Mothballed BWR 1,100 1990
Kashiwazaki Kariwa nuclear power plant 3 Kashiwazaki Kariwa nuclear power plant Mothballed BWR 1,100 1993
Kashiwazaki Kariwa nuclear power plant 4 Kashiwazaki Kariwa nuclear power plant Mothballed BWR 1,100 1994
Kashiwazaki Kariwa nuclear power plant 5 Kashiwazaki Kariwa nuclear power plant Mothballed BWR 1,100 1990
Maki nuclear power plant 1 Maki nuclear power plant Cancelled BWR 780 —
Maki nuclear power plant 2 Maki nuclear power plant Cancelled BWR 1,067 —
Mihama nuclear power plant 1 Mihama nuclear power plant Retired PWR 340 1970
Mihama nuclear power plant 2 Mihama nuclear power plant Retired PWR 500 1972
Monju nuclear power plant Monju nuclear power plant Retired FBR 280 1995
Namie-Odaka nuclear power plant 1 Namie-Odaka nuclear power plant Cancelled BWR 825 —
Ohi nuclear power plant 1 Ohi nuclear power plant Retired PWR 1,175 1979
Ohi nuclear power plant 2 Ohi nuclear power plant Retired PWR 1,175 1979
Ohma nuclear power plant Original Ohma nuclear power plant Cancelled — 600 —
Onagawa nuclear power plant 1 Onagawa nuclear power plant Retired BWR 524 1984
Onagawa nuclear power plant 3 Onagawa nuclear power plant Mothballed BWR 825 2002
Sendai nuclear power plant 3 Sendai nuclear power plant Shelved PWR 1,590 —
Shika nuclear power plant 1 Shika nuclear power plant Mothballed BWR 540 1993
Shika nuclear power plant 2 Shika nuclear power plant Mothballed BWR 1,206 2006
Shimane nuclear power plant 1 Shimane nuclear power plant Retired BWR 460 1974
Tokai nuclear power plant 1 Tokai nuclear power plant Retired GCR 166 1966
Tomari nuclear power plant 1 Tomari nuclear power plant Mothballed PWR 579 1989
Tomari nuclear power plant 2 Tomari nuclear power plant Mothballed PWR 579 1991
Tsuruga nuclear power plant 1 Tsuruga nuclear power plant Retired BWR 357 1970
Tsuruga nuclear power plant 2 Tsuruga nuclear power plant Mothballed PWR 1,160 1987
Tsuruga nuclear power plant 3 Tsuruga nuclear power plant Shelved PWR 1,538 —
Tsuruga nuclear power plant 4 Tsuruga nuclear power plant Shelved PWR 1,538 —

Sources