Kansai Electric Power 9503 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 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, Chugoku Electric Power 9504, Hokkaido Electric Power 9509, Hokuriku Electric Power 9505, Kansai Electric Power 9503, Kyushu Electric Power 9508, Shikoku Electric Power 9507, Tohoku Electric Power 9506 and Tokyo Electric Power (Tepco) 9501.

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