Tokyogasgroup csr report

Contribution to the Environment

Measures in the Electric Power Business

The Tokyo Gas Group has contributed to mitigating climate change by promoting the use of renewable energy sources, such as wind power, for electricity generation in addition to its natural gas-fueled thermal power generation, which is highly efficient and has a low impact on the environment.
Since the full liberalization of Japan’s electricity retail market, Tokyo Gas, as an electricity retailer, has been promoting electricity procurement chiefly 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 create a low-carbon 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 heating value, or 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 1.2 MkW, 75% owned by Tokyo Gas, 58% maximum efficiency).
In addition, we decided to receive the entire output (approximately 1.24 MkW) 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 by using cutting-edge gas turbine combined cycle technology.
Using the electricity generated by these newly built highly efficient power plants in place of electricity produced by the less efficient existing thermal power plants will help reduce our CO2 emissions by the difference between the existing and new plants in CO2 emissions per unit of generated electricity.

Ohgishima Power Station
Ohgishima Power Station
 

Gas Turbine Combined Cycle Technology

Combined cycle power plants that use LNG (liquefied natural gas) as fuel achieve higher power generation efficiency as they convert water to steam with the heat from gas turbines and collect the steam to run steam turbines to generate power.

Combined Cycle Power Generation 

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 Group promotes the procurement of electricity from renewable energy sources with the aim of helping to create a low-carbon society.
Electricity generation costs have recently dropped at wind power plants mainly due to their large-scale operations, and expectations are growing for them to emerge as major producers of renewable energy. We have engaged in wind power generation since 2005 at a plant with an output of 1,990 kW in our Sodegaura LNG Terminal. The Sodegaura plant called for the revocation of its certification under the Act on Special Measures Concerning New Energy Use by Operators of Electric Utilities in March 2013 and obtained certification under the Act on Special Measures Concerning Procurement of Electricity from Renewable Energy Sources by Electricity Utilities. In addition, we sell generated electricity to ENNET Corporation, an electricity retailer.
 

Wind power equipment at the Sodegaura LNG Terminal
Wind power equipment at the Sodegaura LNG Terminal

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 Wind-Power Generation 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.
 
Yuza wind power plant
Yuza wind power plant

On January 2015, we signed a power purchasing agreement with Kuroshio Furyoku Hatsuden K.K., and we have been purchasing approximately 12,000 kW of electricity under this agreement since April 2015. This electricity is generated by two plants operated by Kuroshio Furyoku Hatsuden in the Kanto region: 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.
We intend to expand the use of renewable energy by promoting capital and business tie-ups as well as other collaborations in order to conduct business operations with integrated expertise.
In February 2017, we entered a capital and business partnership with Shizen Energy Inc., a developer of solar farms and other renewable energy power systems, and we set up Prominet Power Co., Ltd. We carry out joint development work toward achieving 60 MW of photovoltaic power generating capacity as soon as possible.
In 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., in order to integrate their expertise for the development and operation of the solar power business.
In June 2018, we signed an agreement with PHOTON JAPAN LLC to cooperate for three years in a solar power generation business and announced that the two companies would pursue joint development. During that period, Tokyo Gas plans to develop a solar power plant with an output of 30,000 kW.
In our efforts to create a low-carbon society, we will continue to explore the possibilities of acquiring electricity generated by various renewable energy sources, such as wind power, biomass, which assures a high
capacity factor, and solar power with 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.