Table: Japan nuclear operations: Kansai Elec restarts Ohi No.3 reactor

Kansai Electric Power Co

15/08/2025 02:40

TOKYO, Aug 15 (Reuters) - Kansai Electric Power 9503.T restarted the 1,180 megawatt (MW) No.3 reactor at its Ohi nuclear power station in western Japan after completing scheduled maintenance and refuelling, a company spokesperson said on Friday.

The restart on Thursday ended a closure that began on June 1.

    The utility also plans to restart the 870-MW No.4 reactor at its Takahama nuclear power station in western Japan in late September, which has been offline for a scheduled maintenance since June 18, the spokesperson said.

Meanwhile, Kyushu Electric Power 9508.T shut the 1,180-MW No.4 reactor at its Genkai nuclear power station in southern Japan on July 27 for scheduled maintenance and refuelling, a company spokesperson said.

As of Friday, Japan has 12 reactors in operation, with a combined capacity of 11,203 MW.

Many companies are undergoing a re-licensing process to meet stricter safety standards implemented after the 2011 Fukushima disaster. Prior to the disaster, they operated 54 reactors.

The table below shows the status of Japan's nuclear power plants.

The regional utilities are: Chubu Electric Power 9502.T, Chugoku Electric Power 9504.T, Hokkaido Electric Power 9509.T, Hokuriku Electric Power 9505.T, Kansai Electric Power 9503.T, Kyushu Electric Power 9508.T, Shikoku Electric Power 9507.T, Tohoku Electric Power 9506.T and Tokyo Electric Power (Tepco) 9501.T.

In the table, the companies are referred to by their regional names.

Japan Atomic Power Company (Japco), a nuclear energy company, owns two reactors.

Company
Plant
Unit
MW
Status
Hokkaido
Tomari
1
579
Shutdown 22/4/11
Hokkaido
Tomari
2
579
Shutdown 26/8/11
Hokkaido
Tomari
3
912
Shutdown 5/5/12
Tohoku
Onagawa
2
825
Online 5/12/24
Tohoku
Onagawa
3
825
Shutdown 11/3/11
Tohoku
Higashidori
1
1,100
Shutdown 6/2/11
Tepco
Kashiwazaki-Kariwa
1
1,100
Shutdown 6/8/11
Tepco
Kashiwazaki-Kariwa
2
1,100
Shutdown 16/7/07
Tepco
Kashiwazaki-Kariwa
3
1,100
Shutdown 16/7/07
Tepco
Kashiwazaki-Kariwa
4
1,100
Shutdown 16/7/07
Tepco
Kashiwazaki-Kariwa
5
1,100
Shutdown 25/1/12
Tepco
Kashiwazaki-Kariwa
6
1,356
Shutdown 26/3/12
Tepco
Kashiwazaki-Kariwa
7
1,356
Shutdown 23/8/11
Chubu
Hamaoka
3
1,100
Shutdown 29/11/10
Chubu
Hamaoka
4
1,137
Shutdown 13/5/11
Chubu
Hamaoka
5
1,380
Shutdown 14/5/11
Hokuriku
Shika
1
540
Shutdown 1/3/11
Hokuriku
Shika
2
1,206
Shutdown 11/3/11
Kansai
Mihama
3
826
Online 21/5/25
Kansai
Takahama
1
826
Online 26/8/24
Kansai
Takahama
2
826
Online 8/2/25
Kansai
Takahama
3
870
Online 1/6/25
Kansai
Takahama
4
870
Shutdown 18/6/25
Kansai
Ohi
3
1,180
Online 14/8/25
Kansai
Ohi
4
1,180
Online 20/2/25
Chugoku
Shimane
2
820
Online 22/12/24
Shikoku
Ikata
3
890
Online 16/10/24
Kyushu
Genkai
3
1,180
Online 13/6/25
Kyushu
Genkai
4
1,180
Shutdown 27/7/25
Kyushu
Sendai
1
890
Online 27/8/24
Kyushu
Sendai
2
890
Online 28/11/24
Japco
Tokai Daini
1
1,100
Shutdown 11/3/11
Japco
Tsuruga
2
1,160
Shutdown 7/5/11
Total
33,083


 (Reporting by Yuka Obayashi)

 ((Yuka.Obayashi@thomsonreuters.com; +813-4520-1265;))