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§05
Network
NETWORK
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§06
History
58 EVENTS
1951: May: Shikoku Electric Power Co., Ltd. founded
Established on May 1, 1951 (Showa 26).
Shikoku Electric Power Co., Ltd. founded
July 1963: The start of operation of our first heavy oil-fired power plant, Anan Power Plant Unit 1, with a capacity of 125,000 kW.
Start of operation of our first heavy oil-fired power plant, Anan Power Plant Unit 1 (125 MW)
November 1965: The start of operation of Saijo Power Plant Unit 1, with a capacity of 156,000 kW (marking the point where thermal power generation surpasses hydroelectric power in approved maximum output from 1965 onward).
Start of operation of Saijo Power Plant Unit 1 (156 MW) (with the approval maximum output exceeding hydroelectric power since fiscal year 1965)
July 1971: The start of operation of Sakaide Power Plant Unit 1, adopting Japan's first combined power generation system (gas turbine and steam turbine), with a capacity of 195,000 kW.
Start of operation of Japan's first combined cycle power plant (gas turbine and steam turbine), Sakaide Power Plant Unit 1 (195 MW)
April 1973: The start of operation of Sakaide Power Plant Unit 3, with a capacity of 450,000 kW.
Start of operation of Sakaide Power Plant Unit 3 (450 MW)
October 1973: The occurrence of the first oil shock.
Occurrence of the first oil shock
September 1977: The start of operation of our first nuclear power plant, Ikata Power Plant Unit 1, with a capacity of 566,000 kW.
Start of operation of our first nuclear power plant, Ikata Power Plant Unit 1 (566 MW)
1979: The occurrence of the second oil shock.
Occurrence of the second oil shock
March 1982: The start of operation of Ikata Power Plant Unit 2, with a capacity of 566,000 kW.
Start of operation of Ikata Power Plant Unit 2 (566 MW)
June 1982: The start of operation of the Kozagawa Pumped Storage Power Plant Unit 1, with a capacity of 300,000 kW.
Honkawa Power Plant (Pumped Storage) Unit 1 300 MW, operation started
December 1994: The start of operation of Ikata Power Plant Unit 3, with a capacity of 890,000 kW (total output of 2,022,000 kW for nuclear power plants).
Ikata Power Plant Unit 3 890 MW, operation started (total output of 2.022 GW nuclear power plant)
March 2000: The start of retail liberalization for extra-high voltage power.
Start of retail liberalization for extra-high voltage
June 2000: The start of operation of Tachibana Bay Power Plant, with a capacity of 700,000 kW.
Tachibana Bay Power Plant 700 MW, operation started
April 2005: The start of retail liberalization for high voltage and above.
Start of retail liberalization for high voltage and above
March 2010: The start of plutonium-thermal power generation at Ikata Power Plant Unit 3.
March 2010: Operation commencement of Sakaide LNG Terminal: LNG conversion of Sakaide Power Plant Unit 4, with a capacity of 350,000 kW.
Start of plutonium thermal power generation at Ikata Power Plant Unit 3
Sakaide LNG Base, operation started: LNG conversion of Sakaide Power Plant Unit 4 350 MW completed and operation started
August 2010: Completion of LNG conversion of Sakaide Power Plant Unit 1 (29.6 MW) and start of operation
LNG conversion of Sakaide Power Plant Unit 1 296 MW completed and operation started
December 2010: Commencement of commercial operation of Matsuyama Solar Power Plant (2,042 kW)
Matsuyama Solar Power Plant 2,042 kW, commercial operation started
March 2011: Great East Japan Earthquake and nuclear accident at Fukushima
Great East Japan Earthquake, nuclear accident at Fukushima occurred
April 2016: Start of full retail liberalization
Start of full retail liberalization
May 2016: Decommissioning of Ikata Power Plant Unit 1
Abolition of Ikata Power Plant Unit 1
August 2016: Completion of LNG conversion of Sakaide Power Plant Unit 2 (289 MW) and start of operation
LNG conversion of Sakaide Power Plant Unit 2 289 MW completed and operation started
May 2018: Decommissioning of Ikata Power Plant Unit 2
Abolition of Ikata Power Plant Unit 2
March 2019: Decommissioning of Anan Power Plant Units 1 and 2
Abolition of Anan Power Plant Units 1 and 2
2019: April: Shikoku Electric Power Transmission & Distribution Co., Ltd. (preparation company for split) established
Shikoku Electric Power Transmission & Distribution Co., Ltd. (preparation company for split) established
April 2020: Spin-off of the power transmission and distribution division as "Shikoku Electric Power Transmission and Distribution Co., Ltd."
Divestiture of transmission and distribution division as "Shikoku Electric Power Transmission and Distribution Co., Ltd."
June 2023: Completion of replacement of Saijo Power Plant Unit 1 (500 MW) and start of operation
Replacement of Saijo Power Plant Unit 1 500 MW completed and operation started
September 2023: Decommissioning of Anan Power Plant Unit 4
Abolition of Anan Power Plant Unit 4
Abolition of Anan Power Plant Unit 3 (complete abolition of Anan Power Plant)
§07
News
118 ARTICLES
Application for Approval of Measures to Reduce Electricity Bill Burden
Shikoku Electric Power Co., Ltd. has applied for approval of measures to provide discounts on electricity bills for low-voltage supply customers of 1.00 yen/kWh in January and 4.50 yen/kWh in February and March, and for high-voltage supply customers of 0.50 yen/kWh in January and 2.30 yen/kWh in February and March, starting from January 2027. Customers do not need to take any action, and the adjusted fuel cost after the discount can be confirmed via the web, postcard, or invoice.
Incident Reporting and Notification at Ikata Power Plant (October 2026) and Report
At Ikata Power Plant, a cooperative company employee was injured on October 22, and an emergency transport occurred on October 26. Additionally, from April 28 to July 16, multiple equipment failures and seawater leaks were reported, and the report summarizes the details and countermeasures for these incidents.
Consideration of Power Supply within Ehime Prefecture and Nanyo DC Project
Shikoku Electric Power has begun exploring a local consumption scheme to supply decarbonized power sources, centered on the Ikata power plant, to data centers and other facilities within Ehime Prefecture. Additionally, it is considering the location of a generative AI data center in the Nanyo region. To move toward concrete implementation, a project team will be established on November 1, and a public‑private co‑creation working group with Ehime Prefecture will be launched.
Status of Digital Infrastructure Development in Shikoku
Shikoku Electric Power announced the status of its initiatives under the “Shikoku Digital Gateway Initiative,” which is related to attracting large-scale data centers. One of these initiatives is the development and construction of AUG-East, an international submarine cable approximately 8,900 km long connecting Japan and Singapore. The plan is to bring the cable ashore at locations including Tokushima, with operations scheduled to begin in fiscal 2029.
Revision of 2026 Fiscal Year Performance Forecast
We revised the 2026 fiscal year performance forecast. Sales revenue decreased by 200 from the last announcement to 9,050, while operating profit increased by 75 to 445, ordinary profit increased by 100 to 500, and net income attributable to shareholders of the parent company increased by 75 to 375. Total sales electricity volume is expected to be 373, down 16 from the last announcement.
Overview of Consolidated Financial Results for the First Half of Fiscal 2026
Retail electricity sales volume decreased 7.0% year on year to 10.81 billion kWh, due to factors including a decline in contracted power and a rebound from the high temperatures of the previous summer. Meanwhile, wholesale electricity sales volume increased 26.0% to 7.761 billion kWh, driven by factors including an increase in bilateral sales and sales through the Japan Electric Power Exchange. Total electricity sales volume increased 4.5% to 18.571 billion kWh.
October 2026 Regular Press Conference by the President
On October 30, 2026, President Miyamoto discussed the consolidated financial results for the first half of the fiscal year, revisions to the earnings forecast, the development of digital infrastructure in Shikoku, and the start of discussions on a locally produced and locally consumed electricity supply business in Ehime Prefecture and a data center business in the Nanyo region. Total electricity sales for the first half were 18.571 billion kWh, up 4.5% year on year. Retail sales declined 7.0%, while wholesale sales increased 26.0%.
Fuel Cost Adjustment for December 2026 Electricity Rates
Following the trade statistics for September 2026, the fuel cost adjustment rate to be applied to December 2026 electricity rates has been finalized. The average fuel price for low-voltage supply is 46,100 yen/kL, an increase of 100 yen/kL from November. The fuel cost adjustment rate for metered supply is minus 5 yen 22 sen per kWh, an increase of 2 sen from November.
Employee from a partner company slips and falls at Ikata Power Plant, emergency transport
Today, an employee from a partner company slipped and fell outside the Ikata Power Plant premises (outside the controlled area), injuring his head. He was transported to the hospital by ambulance at 11:08. The employee was conscious, with no radiation exposure or contamination.
Announcement of the Winter Lifestyle Support & Energy Saving Challenge Campaign 2027 Implementation
Shikoku Electric Power will offer a point rebate as a lifestyle support benefit for electricity bills from January to March 2027. The offer applies to customers who are subscribed to one of the 15 plans designated by the company and are registered with the Yonden Concierge. Normally, 5 points are awarded per 200 yen, and 10 points are awarded when switching from the Consumption Light A plan to the Otuke e plan. No application is required.
§08
Public records
GOV
National Tax Agency basic information9470001001933
Source: National Tax Agency Corporate Number Publication Site, basic three items
Trade name
四国電力株式会社
Trade name (kana)
シコクデンリョク
Name in English
Corporation type
301
Address
〒760-0033 香川県高松市丸の内２番５号
Postal code
7600033
Prefecture code
37
City code
201
Address outside Japan
Prefecture in English
City in English
Address outside Japan in English
Corporate number assignment date
2015-10-05
Update date
2020-04-15
Change date
2015-10-05
Registry closure date
Reason for registry closure
Successor corporate number
Details of the change
Latest record
1
Excluded from search
0
Processing type
01
Correction type
1
Trade name image ID
Address image ID
Sequence number
5075647
METI gBizINFO9470001001933
Source: gBizINFO (Ministry of Economy, Trade and Industry)
