Tokyogasgroup csr report

Decarbonization through Energy Supply

Best Practices at the Electric Power Business


The Tokyo Gas Group has contributed to mitigating climate change by actively developing its renewable energy business, including the use of wind power to generate electricity, in addition to natural gas-fueled thermal power generation, which is highly efficient with a low impact on the environment. Since the full deregulation of Japan’s electricity retail market, Tokyo Gas, as an electricity retailer, has been promoting electricity procurement, primarily from highly efficient thermal power plants and renewable energy power generators, while working to curb CO2 emissions at the retail stage. The company partners with other power utilities to realize a decarbonized society via the Electric Power Council for a Low Carbon Society, in which it has been a member since its foundation.

Most Advanced, Highly Efficient Natural Gas-Fired Thermal Power Plant

Tokyo Gas-affiliated power plants are operated by Tokyo Gas Baypower Co., Ltd. (100,000 kWh, wholly owned by Tokyo Gas, 50% maximum efficiency on a lower calorific value, or lower heating value (LHV), basis at the generating end), Tokyo Gas Yokosuka Power Co., Ltd. (240,000 kW, 75% owned by Tokyo Gas, 51% maximum efficiency), Kawasaki Natural Gas Power Generation Co., Ltd. (840,000 kW, 49% owned by Tokyo Gas, 58% maximum efficiency), and Ohgishima Power Co., Ltd. (approximately 1.22 MW, 75% owned by Tokyo Gas, 58% maximum efficiency).
In addition, we decided to receive the entire output, approximately 1.2 MW, of the Moka Power Station, which Kobelco Power Moka Inc., a wholly owned subsidiary of Kobe Steel, Ltd., is building in Moka City, Tochigi Prefecture. The plant’s first unit will be completed in the second half of 2019 and its second in the first half of 2020.
These plants are all highly energy-efficient natural gas-fueled power plants that generate electricity using cutting-edge gas turbine combined cycle technology.
Generating electricity at these newly built highly efficient power plants in place of existing thermal power plants will help reduce our CO2 emissions.

Ohgishima Power Station
Ohgishima Power Station

Gas Turbine Combined Cycle Technology

Combined cycle power plants that use liquefied natural gas (LNG) as fuel achieve higher power generation efficiency as they draw upon the heat from gas turbines to convert water to steam, which is then collected to run power-generating turbines.
 

The process of combined cycle power generation

The process of combined cycle power generation
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Promoting Renewable Energy

The Tokyo Gas Group has been seeking to acquire renewable energy sources focused on land-based wind power. In fiscal 2017, we began expanding our efforts to include solar power and offshore wind power generation. We intend to accelerate our participation in joint ventures with business partners in projects not only in Japan but also in other countries and regions. Our immediate goal is to acquire renewable energy sources capable of generating electricity at the scale of 1 million kW (400,000 kW in Japan and 600,000 kW overseas).
 

Wind Power Generation

We built our first wind power plant at our Sodegaura LNG Terminal with an output of 1,990 kW in October 2005. Our second venture into the wind power business began with the announcement in April 2011 of our investment in Shonai Wind-Power Generation Co., Ltd. Shonai now operates two wind power plants in Yamagata Prefecture, including the Yuza Wind Power Plant, in operation since December 2010, with a combined power generating capacity of 16,360 kW.

Major Projects in Recent Years
  1. January 2015:Signed a power purchasing agreement with Kuroshio Furyoku Hatsuden K.K.
  2. April 2015:Began purchasing approximately 12,000 kW of electricity generated by plants operated by Kuroshio Furyoku Hatsuden in the Kanto region, such as the Choshi Takada-cho Wind Power Plant, which entered service in 2006 with one 1,990 kW turbine, and the Shiishiba Wind Power Plant, which entered service in 2009 and has five 1,990 kW turbines.
 

Yuza wind power plant

Yuza wind power plant

Solar Power Generation

We also promote capital and business tie-ups and collaborations with other companies on projects related to solar power generation to conduct operations leveraging our integrated expertise and expand the use of renewable energy. We will continue to engage in joint development and operations to acquire more sources of solar power by incorporating the expertise of our partners.
Major Recent Projects
  1. February 2017:Entered a capital partnership with Shizen Energy Inc.
  2. August 2017:Established Prominet Power Co., Ltd.
  3. May 2018:Prominet Power Co., Ltd. and Kyudenko Corporation acquired part of Tokyo Century Corporation’s stake in a wholly owned company, SKF Power Co., Ltd., with six power plants and a combined output of 9,717 kW.
  4. June 2018:Through JE Capital Partners Ltd., Prominet Power Co., Ltd. purchased the entire stake of a company that owns and operates solar power plants developed by PHOTON JAPAN LLC (six plants with a combined output of 9,090 kW).
  5. January 2019:Prominet Power Co., Ltd. acquired LIXIL Corporation’s solar power generation operations (output: 4,872 kW) based in Kyoto.
 

Kumagaya solar power plant in Saitama Prefecture

Kumagaya solar power plant in Saitama Prefecture
 

As part of our efforts to create a decarbonized society, we will continue to explore the possibilities of acquiring electricity generated by various renewable energy sources, such as wind power, biomass with its high facility utilization factor, and solar power featuring high potential capacity.

DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.