Q'd TOKYO ENERGY & SYSTEMS INC.

Corporate Outline Corporate Outline

Company Profile

Company Name TOKYO ENERGY & SYSTEMS INC.
Address of
Head Office		 1-3-1 Nihonbashi Kayabacho, Chuo-ku, Tokyo, 103-0025 Japan
Phone +81 3-6371-1947
Fax +81 3-3669-0920
Date of Establishment August 14, 1947
Capital Stock 2,881 million yen (as of March 31,2026)
Business Outline
  1. Planning, study, design, construction and supervision of electric and mechanical facilities for the following plants and facilities:
    • Thermal Power Plants
    • Nuclear Power Plants
    • Hydro-electric Power Plants
    • Substations
    • Chemical Plants
    • Industrial Plants
    • Environmental Facilities
    • Building & Housing
  2. Planning, study, design and construction of telecommunication system and electronic facilities
  3. Design and construction of civil and architectural facilities
  4. Operation and maintenance of the above facilities
  5. Manufacture, sales and leasing of mechanical equipment, materials and fuels
  6. Electricity supply business
  7. Warehousing business
  8. Worker dispatching business
  9. Sales/purchase, leasing, and management of real estate
  10. Investing in other businesses or becoming the founder of a company
Stock List Tokyo Stock Exchange the Prime Market (Code:1945)
Number of Employees 1,334 (as of March 31,2026)
Major Client
  • Tokyo Electric Power Company Holdings, Inc.
  • TEPCO Power Grid, Incorporated
  • TEPCO Energy Partner, Incorporated
  • TEPCO Renewable Power, Inc.
  • JERA Co., Inc.
  • Hokkaido Electric Power Co., Inc.
  • Hokuriku Electric Power Company
  • Tohoku Electric Power Co., Inc.
  • The Chugoku Electric Power Co., Inc.
  • The Okinawa Electric Power Company, Incorporated
  • Japan Nuclear Fuel Limited
  • The Japan Atomic Power Company
  • Nuclear Engineering and Services Company
  • Recyclable-Fuel Storage Company
  • J-Tech Co., Ltd.
  • Hokkaido Power Engineering Company, Incorporated
  • Kanden Energy Solution Co., Inc.
  • Kashima Cooperative Thermal Power Company, Inc.
  • JOBAN JOINT POWER Co., Ltd.
  • Soma Kyodo Power Company, Ltd.
  • Mitsubishi Heavy Industries, Ltd.
  • Mitsubishi Electric Corporation
  • Mitsubishi Fuso Truck and Bus Corporation
  • Hitachi, Ltd.
  • Hitachi Plant Construction, Ltd.
  • Kanadevia Corporation
  • Ohgishima Power Co., Ltd.
  • East Japan Railway Company
  • TOSHIBA CORPORATION
  • Toshiba Plant Systems & Services Corporation
  • Kawasaki Heavy Industries, Ltd.
  • IHI Plant Services Corporation
  • FUJI ELECTRIC Co., Ltd.
  • Sumitomo Heavy Industries, Ltd.
  • JFE Engineering Corporation
  • JFE Steel Corporation
  • NIPPON STEEL TEXENG Co., Ltd.
  • KOBELCO E&M Co., Ltd.
  • JGC HOLDINGS CORPORATION
  • Chiyoda Corporation
  • J&T Recycling Corporation
  • JAPAN FACILITY SOLUTIONS, Inc.
  • Hitachi Mitsubishi Hydro Corporation
  • NGK INSULATORS, Ltd.
  • TOKYO GAS CO., LTD.
  • Cosmo Oil Co., Ltd.
  • Cosmo Engineering Co., Ltd.
  • ENEOS Corporation
  • KASHIMA OIL CO., LTD.
  • Mitsui Chemicals, Inc.
  • JCOM Co., Ltd.
  • Nippon Dry-Chemical Co., Ltd.
  • NARITA INTERNATIONAL AIRPORT CORPORATION
  • Meiji Shrine
  • Tokyo Metropolitan Government
  • Chuo City, Tokyo
  • Kanagawa Prefectural Government
  • Yamanashi Prefecture
Group Companies
  • Toko Kigyo Co., Ltd.
  • BYCOM Co., Ltd.
  • Techno Tokyo Co., Ltd.
  • TOKI Co., Ltd.
  • Tokyo Enesys (Thailand) Co., Ltd.
  • Admiration Co., Ltd.
  • SCI Enesys Co., Ltd.
  • SAKAIMINATO ENERGY POWER
  • Kumamoto Energy Power
  • North Alps Energy Power
  • Tokyo Enesys Vietnam Co., Ltd.
  • ABTS ENESYS ENGINEERING LTD.
  • Fuso Co., Ltd.

About ISO certification

We obtained quality management systems certification under the International Organization for Standardization (ISO) 9001 standard in 1998 in order to demonstrate our ability to provide high-quality construction work to customers through the construction of power supply equipment. Based on this certification, we have expanded our day-to-day business operations.

Moreover, we consider “environmental protection for society and the surrounding area” and “security of the occupational safety and health of employees and workers” to be key elements of our company’s operational philosophy.

In March 2006, we laid the cornerstone of our quality management system, which is an integrated management system incorporating vital aspects of occupational health and safety management and environmental systems.

Standard of
quality assurance		 ISO 9001
Certification provided LRQA Limited
Application organization Whole company
The certification
registration date		 July 24, 1998
Scope of registration Sales, design, procurement, manufacturing, construction, installation and maintenance of mechanical, electrical, civil engineering, architectural, and telecommunications equipment for thermal, nuclear, and renewable energy power plants, substations and other facilities

Organization (Revised on April 1, 2026)Download PDF(68KB)

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