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CSR Charter ⅡHarmonizing with the Environment and Contributing to Realizing a Sustainable Society

Environmental Action Targets


  • Effluents and Waste

Principle and Outline

The Daigas Group has set out medium-term environmental targets to reduce environmental impact by the Group as a whole, particularly in its city gas business, and is monitoring the progress being made toward achievement of these targets.

In pursuit of the environmental action targets, we will be seeking to make environmental management more efficient, reduce CO2 emissions, curb waste generation and promote recycling, and reduce the volume of excavated soil for final disposal.

Environmental Action Targets and FY2018 ResultsOsaka Gas underwent a third party verification by Bureau Veritas Japan Co., Ltd.

Steady progress was made toward achieving the environmental action targets for FY2021, as evidenced by the improvement of most indicators of environmental management efficiency, an integrated yardstick used to assess our environmental conservation activities. Behind the improvement were the start of full-scale operation of the cryogenic power generation facilities for LNG terminals, progress in the reuse of excavated soil, and enhanced energy-saving activities, including the introduction of LED lighting in FY2018.

Environmental Action Targets (for FY2021)

Field Indicators Targets for FY2021 FY2017 Results
Integrated indicator Environmental Management Efficiency Environmental impact of gas business per gas produced (Monetary value (yen) of GHG, excavated soil, waste, NOx, COD, chemical substances, water consumption / gas produced (1,000 m³ ) ) 14.2 or less
(22% decrease compared to FY2009)
Low-carbon society Reducing CO2 emissions from our business activities City gas
LNG terminals (CO2 emissions per 1 million m³ of gas produced) (t-CO2 / 1 million m³ ) 11.7 or less
(12% decrease compared to FY2009)
Office buildings (CO2 emissions per 1000 m² floor space) 56.5 or less (27% decrease compared to FY2009) 54.7
Group companies' businesses*2 Electricity business (including renewable energy sources) (CO2 emissions per electricity generated) 15% decrease compared to FY2009 32% decrease
Other businesses (CO2 emissions per sales) (t-CO2 / 10 million yen) 8.2 or less (12% decrease compared to FY2009) 9.2
Reducing CO2 emissions on customer sites and throughout the value chain Customers Centered on natural gas, Osaka Gas aims to reduce greenhouse gas emissions by diffusing energy-efficient value-added products.
  • Diffusion and expansion of energy-efficient fuel cells (for residential and commercial use)
  • Promotion of fuel cells (for residential use) as a low-carbon electric source through the active purchase of redundant household-produced electricity derived from fuel cells
  • Diffusion and expansion of appliances deemed effective in saving and creating energy in a zero energy house (ZEH), a smart house whose net energy consumption is zero (through the use of fuel cells, solar power generation systems, and energy-efficient water heaters)
  • Promotion of natural gas as a low-carbon energy source, and the diffusion and expansion of energy-efficient cogeneration systems and gas air-conditioners to reduce peak electricity demand
  • Diffusion and expansion of the ICT energy management system through the addition of advanced functions
  • Use of solar and wind power systems, biomass and renewable energy sources
  • Diffusion and expansion of natural gas through retail sales across broad areas of Japan and overseas, and energy services
  • Cumulative sales of residential-use fuel cell Ene-Farm reached 80,000 units.
  • Started sales of business-use 3kW-SOFC (solid oxide fuel cell) system (power-generation efficiency of 52%).
  • Raised the effect of purchase of redundant electricity (from approx. 5,000 yen to 7,000 yen due to the improved performance of appliances).
  • Ene-Farm and the smart energy storage system were adopted by skyscraper condominiums.
  • Released new services for customers using Ene-Farm or Eco-Jozu for IoT (smart speaker to operate gas appliances, hot water monitor, etc.)
  • Raised the target for introduction of renewable energy sources in 2030 from 500,000 kW to 1 million kW.
  • Started operation of Nakayama Nagoya No. 2 Power Plant (30% biomass-mixed combustion) (September 2017).
  • Started energy supplies for tire factories in Thailand.
Transportation / logistics
  • Reduction of environmental impact through the efficient operation of eight LNG tankers currently under the management of Osaka Gas
  • Efforts to spread natural gas-powered vehicles centering on large-sized trucks used by Group companies and business partners in the shipping and distribution businesses
  • Promoted constant-speed operation to improve transportation efficiency.
  • Introduced four large CNG trucks.
CO2 emissions reduction for entire Group (t-CO2) (including contribution to reductions at customer sites and overseas) 7 million tons 0.61 million tons
Resource recycling Promoting the 3Rs in our business Gas business Industrial waste from LNG terminals (final disposal rate) 1% or less*1 0.1%
Industrial waste from facilities other than LNG terminals (final disposal rate) 1% or less 0.8%
General waste (final disposal rate) 3% or less 2.3%
Excavated soil (final disposal rate) 1% or less 0.4%
Polyethylene (PE) pipes (recycling rate) 100% 100%
Gas meters (reuse rates) 98% or more 99.5%
Group companies (core affiliates*2) Industrial waste / general waste (final disposal rate) 4% or less 3.3%
Efforts throughout the value chain
  • Promote the 3Rs of used equipment at our customers, in cooperation with our business partners (residential gas equipment, alarms, packing materials, renovation waste, PCs, commercial/industrial equipment, etc.)
  • Redesigned and firmly established system for appropriate disposal of used water heaters
  • We will take biodiversity into account in conducting business in accordance with the Daigas Group Biodiversity Promotion Policy. (LNG terminals, business offices and real estate properties managed by Group companies)
  • Promoted green space management in LNG terminals taking biodiversity into account and conducted biodiversity education.
  • Introduced native seedlings, etc. for properties of urban development business (development/management of condominiums for sale and rent).
  • Revised and issued a leaflet summarizing the Daigas Group's efforts to promote biodiversity.
Technology development Promotion of technological development to help create a low-carbon society and further solidify the Company's already solid business foundation
  • Efforts to develop more energy-efficient fuel cells, cogeneration systems and gas air-conditioners
  • Development of demand response control technologies to contribute to the trading of saved electricity
  • Development of reasonably priced and energy-efficient hydrogen-generating equipment to be installed at hydrogen-filling stations
  • Development of environmental technologies that can spur the environmental equipment market, such as technologies that can lead to new products and those that can expand application fields
  • Co-developed a gas-fired small through-flow steam boiler (1,200 kg/h) using low-pressure gas, for the first time in Japan, achieving a boiler efficiency of 98%, up 1% from the conventional model for mid-pressure gas.
  • Launched in Thailand commercial demonstration of producing high-purity methane gas from biogas and providing it for natural gas-fueled vehicles.
  • The method for testing “activated carbon fiber” proposed by the Japan Activated Carbon Fiber Association (*3) was approved by the ISO and issued as an international standard.
Green procurement / purchasing
  • Promote green purchase in cooperation with clients and a green partnership system
  • Expanded green purchasing items and renewed green partner agreements
*1 Industrial waste from LNG terminals (final disposal rate)
Industrial waste covered for the rate calculation excludes the disposal of PCB, a chemical substance whose disposal by 2027 is mandatory.
*2 Group companies
Of 138 Osaka Gas consolidated subsidiaries, 57 companies are subject to the calculation of greenhouse gas emissions. Those housed in office buildings as tenants and whose environmental data are difficult to grasp and whose environmental effects are minimal are not subject to such calculation. Also excluded from the calculation are overseas companies whose environmental impacts are minimal. The number of companies covered by the calculation changes every year, depending on corporate integration and other streamlining actions taken during each year.
*3 Japan Activated Carbon Fiber Association
Osaka Gas is the representative of the Association.

Long-Term Vision toward FY2031

We will continuously strive to reduce the environmental impacts of our business activities, and from our products and services, in cooperation with our customers in line with the Daigas Group Environmental Activities Policy, adopted in 2006. We will also step up environmental improvement activities both in Japan and overseas, including regional areas. By taking all these actions, we are committed to helping create a sustainable society.

Specifically, we will encourage our customers to introduce energy-efficient appliances deemed effective in saving energy and reducing CO2 emissions, such as fuel cells and gas cogeneration systems. We will also promote a switch to environment-friendly natural gas, the active use of energy-saving technologies, and the development and introduction of the most advanced fossil-based power stations and renewable energy sources. By implementing all these measures, we aim to reduce CO2 emissions by a cumulative 70 million tons between FY2018 and FY2031. The reduction target covers emissions reduction by customers and through our overseas operations. We will continue to promote environmental management by taking into consideration resource recycling, biodiversity and the safety of chemical substances.

Participation in the KEIDANREN's Commitment to a Low Carbon Society

The Japan Business Federation (Keidanren) recognizes global warming as a global-scale issue to be addressed on a long-term basis. Based on this recognition, Keidanren has set out a common vision for Japan's industry—using its technological expertise to play a pivotal role in global efforts to halve greenhouse gas emissions in the world by 2050. This vision was transformed into a Keidanren action plan to create a low-carbon society, drawn up in 2013 and revised in 2017. The action plan spells out what each participating industry should do in Japan through the maximum use of “best available technologies” (BAT) to reduce as much as possible CO2 emissions from business activities and people's life-related activities. The action plan also calls for each industry to provide strong support to overseas efforts to stem global warming. Also set in the action plan are goals and activities aimed at strategically developing innovative technologies that could become a breakthrough for the 2050 CO2 reduction goal.

The Japan Gas Association and the Electric Power Council for a Low Carbon Society (ELCS), both participating in the action plan, have formulated their respective industry plans for realizing a low-carbon society. Osaka Gas, a member of both the association and the ELCS, has joined the industry plans and is working out measures to combat global warming (climate change).

CSR of Daigas Group

President's Commitment
Management and CSR of the Daigas Group
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Development Goals (SDGs)
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Harmonizing with the Environment and Contributing to Realizing a Sustainable Society
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President's Commitment
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