History
(as of May, 2017)
| 1951 | 5/1 | Established as the Tokyo Electric Power Company with ¥1,460 million in capital |
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| 1953 | 11/18 | Following its founding, commenced operations of Unit No. 3 (55 MW) at Ushioda Thermal Power Station, TEPCO's first thermal power generating facility |
| 1959 | 8/18 | With the completion of Unit No. 4 at Chiba Thermal Power Station, thermal power output exceeded hydropower output |
| 1965 | 12/10 | Started operating Unit No. 2 (80 MW) at Yagisawa Power Station, TEPCO's first pumped-storage plant |
| 1969 | 8/8 | Summer system peak load surpassed that of winter (from winter peak to summer peak) |
| 1971 | 3/26 | TEPCO's first nuclear power facility, the Fukushima Daiichi Nuclear Power Station's No. 1 reactor (460 MW) began operation |
| 1980 | 4/1 | Electricity rates rose 52.33%, brought on by the second oil crisis and a sharp increase in fuel costs |
| 1983 | 4/1 | Established district heating and cooling system at Hikarigaoka in Tokyo |
| 1984 | April | Started the "Echo System" to improve our customer responsiveness |
| 1985 | 12/20 | Began operation of the Futtsu Thermal Power Station, which used TEPCO's first combined cycle generators |
| 1987 | 10/1 | Launched utility bill collection at convenience stores |
| 1992 | 12/25 | Released its first Environmental Action Report, which was aimed at addressing environmental issues (Since then, the report has been published annually.) |
| 1995 | 5/15 | TEPCO's cumulative nuclear power generating output achieved one billion MW |
| 1996 | 3/25 | Released its "Management Plan Guideline" combining the "Management Efficiency-Enhancement Plan," "Supply Plan," and other plans (to be released annually) |
| 1997 | 1/10 | Determined the successful bidders to supply power during the three-year period from fiscal 1999, when IPP supply begins (eight companies for 1,100 MW) |
| 7/2 | Initiated operation of Unit No. 7 at Kashiwazaki-Kariwa Nuclear Power Station; All units were completed for a total output of 8.2 million kW, making it one of the world's largest-capacity nuclear power plants | |
| 11/4 | TEPCO's Code of Behavior formulated | |
| 1998 | 2/10 | Reduced electricity rates an average of 4.2% |
| 2000 | 3/21 | Commencement of liberalization of retail sector for high-demand customers |
| 3/31 | Started operations of Hachijojima Windmill Power Station, TEPCO's first windmill power generation facility for commercial use | |
| 10/1 | Reduced electricity rates 5.32% | |
| 10/1 | Initiated Green Power Fund | |
| 2001 | 1/30 | Established the Mutsu Office in Aomori Prefecture. Location feasibility study commenced (Results announced April 3, 2003) |
| 3/29 | Announced Management Vision | |
| 7/24 | Recorded highest system peak load in five years (64.3 million kW) | |
| 2002 | 4/1 | Reduced electricity rates 7.02% |
| 2003 | 3/24 | TEPCO's Code of Behavior revised Corporate Code of Conduct Based on TEPCO's Corporate Ethics formulated |
| 2004 | 10/1 | Electricity rates reduced 5.21% |
| 10/7 | Publication of Management Vison 2010, the TEPCO Group's Medium-Term Management Policy | |
| 2005 | 4/1 | Scope of the liberalization of retail power sales extended to all customers who receive high-voltage electricity |
| 11/21 | Established the Recyclable-Fuel Storage Company through a joint venture with The Japan Atomic Power Company (to replace the Mutsu Office) | |
| 2006 | 4/1 | Reduced electricity rates 4.01% |
| 2007 | 6/15 | Kawasaki Thermal Power Station, Japan's first 1,500oC-class, more advanced combined cycle generator, commenced operations (Unit No. 1 train, axle 3: 500,000 kW) |
| 2010 | 9/13 | Announced 2020 Vision: TEPCO Group Medium to Long-term Growth Declaration |
| 9/29 | Resolution of capital increase through public offering of stock (Approx. two hundred and fifty million stocks) | |
| 2011 | 3/11 | Occurrence of Tohoku-Chihou-Taiheiyou-Oki Earthquake and Tsunami
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| 3/14-28 | Rolling blackouts implemented due to the impact of Tohoku-Chihou-Taiheiyou-Oki Earthquake | |
| 3/15 | March 15 Establishment of the Government-TEPCO Unified Response Headquarters | |
| 3/31 | Establishment of the Fukushima Nuclear Influence Response Division | |
| 7/1-9/22 | Power usage restriction in accordance with Article 27 of the Electricity Business Act | |
| 10/3 | Announcement of report by the "Committee of Management and Financial Investigation for TEPCO (established on May 24)" | |
| 11/4 | Approval of the "Special Business Plan" | |
| 12/9 | Announcement of "Action plans for reform promotion" | |
| 12/21 | Announcement of the Mid-and-long Term Roadmap towards the Decommissioning of Units 1-4 of TEPCO Fukushima Daiichi Nuclear Power Station | |
| 2012 | 4/1 | Electricity rate raise in effect for the deregulated sector |
| 5/9 | Approval of the "Comprehensive Special Business Plan" | |
| 6/20 | Announcement of the Fukushima Nuclear Accident Investigation Report | |
| 6/27 | Transition to a Company with Committees | |
| 7/31 | Acceptance of our preferred stock by the Nuclear Damage Liability Facilitation Fund | |
| 9/1 | Electricity rate revision for the regulated sector (average of 8.46% increase) | |
| 11/7 | Announcement of the "Management Policy towards Restoration" and the "Intensive Reform Implementation Action Plan" | |
| 2013 | 1/1 | Establishment of the Fukushima Revitalization Headquarters |
| 4/1 | Introduced an in-house company system | |
| Establishment of three in-house companies, the "Fuel and Power Company", "Power Grid Company" and "Customer Service Company" | ||
| 4/10 | Establishment of the "Social Communication Office" reporting directly to the President | |
| 5/15 | Establishment of the "Nuclear Safety Oversight Office" | |
| 2014 | 1/15 | Approval of the "New Comprehensive Special Business Plan" |
| 4/1 | Establishment of the "The Fukushima Daiichi Decontamination and Decommissioning Engineering Company" | |
| 10/7 | Entered into a basic agreement for a comprehensive alliance with Chubu Electric Power | |
| 2015 | 4/1 | Establishment of the "Niigata Headquarters" |
| 4/1 | Establishment of three in-house companies, the "Renewable Power Company", "TEPCO Research Institute" and the "Business Solutions Company" | |
| 4/30 | Establishment of "JERA Co., Inc." as a joint venture with Chubu Electric Power | |
| 8/28 | Commenced operation of the Company's first wind farm, the "Higashi-izu Wind Power Plant" (Max. output of 18,370 kW) |
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| 2016 | 4/1 | Shifting to a holding company system This resulted in a change of business name to "Tokyo Electric Power Company Holdings", with the fuel and thermal power business succeeded by "TEPCO Fuel and Power", the power supply business by "TEPCO Power Grid" and the retail electricity business by "TEPCO Energy Partner" Full deregulation of electricity retailing started Started a new energy pricing service lineup |
| 2017 | 3/9 | 1st and 2nd TEPCO Power Grid corporate bonds issued |
