Achieving a Low-Carbon/Carbon-Neutral Society
-Daigas Group’s Initiatives

Our Business

Recognition of ExternalEnvironment

As the trend toward decarbonization accelerates even further, global economic stagnation and growing volatility in energy markets are becoming more apparent. From the perspective of S+3E,*1 the basic policy of the Japanese government’s energy policy, we believe in the importance of achieving both the stable supply and securing security of energy and carbon neutralization of energy.

  • *1 S+3E: Safety, Energy security, Economic efficiency, and Environment

Review of FY2023.3 and Future Strategy

In FY2023.3, under the Carbon Neutral Vision announced in 2021, the Daigas Group strengthened its efforts to build a supply chain for e-methane*2 both in Japan and overseas, along with advancing the development of technologies and renewable energy, for the full-scale introduction of methanation*2 technologies in FY2031.3. With the recognition of the external environment as described above, we released Energy Transition 2030 (ET2030) in March 2023 that outlines the overall picture of the Group’s transition to low-carbon and carbon-neutral energy.

  • *2 Methanation is a technology that synthesizes methane, the main component of city gas, from hydrogen and CO2. “e-methane” refers to methane synthesized by methanation.

Carbon Neutral Vision and Energy Transition 2030 Carbon Neutral Vision and Energy Transition 2030

Indicators and FY2023.3 Results

CO2 emissions across the Group 25.98 million tons*3
25.05 million tons*4

In ET2030, we declared CO2 emissions reduction targets for FY2031.3 for the Daigas Group. To achieve these targets, we willpromote initiatives aimed at net zero emissions from fleets, etc.

  • *3 Please refer to Integrated Report(P.62) for details of greenhouse gas (GHG) emissions from the Daigas Group’s value chain (Scope 1, 2 & 3).
  • *4 Emissions throughout the domestic supply chain (Scope 1, 2 & 3) (New targets for FY2031.3 set in ET2030)
Percentage of renewables in our power generation portfolio in Japan 13.0%
Renewables development contribution on a global basis 211.0 GW

In FY2023.3, we promoted the more widespread use of renewable energy sources with various initiatives such as the joint development of solar power projects in Japan and overseas and the launch of commercial operation of new wind farms in Japan. In doing so, we have steadily increased our renewables development contribution toward our FY2024.3 target of 2.50 GW.

Avoided emissions*5 (baseline: FY2017.3) 3.86 million tons

We have taken several initiatives, which included cryogenic power generation at our LNG terminals, the introduction of renewable energy sources in Japan and high-efficiency thermal power generation both in Japan and overseas, the introduction of fuel cells and gaspowered air conditioning and high-efficiency hot-water heaters at customer sites, and conversion to the use of natural gas as a fuel in Japan and overseas.

Energy Transition 2030

Under Energy Transition 2030 (ET2030), the Daigas Group outlines the overall picture of its transition to low-carbon and carbon-neutral energy.
In order to achieve carbon neutrality, a steady transition to low-carbon energy is crucial, as a great deal of time and social cost will be required for technological innovation and the building of new supply chains. It is also important to choose optimal energies and supply methods to suit the customer's energy use characteristics, such as the balance of electricity and heat use and their location.
Focusing on the transition to low-carbon energy by 2030 through a shift from coal and oil to natural gas, and the seamless transition to carbon-neutral energy with the introduction of e-methane and biogas in the future, we will continue to pursue the decarbonization of power sources in ways that meet customer needs. This will include the use of hydrogen and ammonia, the decarbonisation of power sources, such as renewable energy generation and zero-emission thermal power plants. The following chapters present the Daigas Group’s roadmap for CO2 reduction, along with the background and approach to our major initiatives for decarbonization through ① Low carbon transition with the advanced utilization of natural gas, ② Initiatives for the social implementation of e-methane, ③ Initiatives in the electricity business to achieve carbon neutrality, and ④ Initiatives concerning the capture, utilization, and storage of CO2.


Energy Transition 2030 *1 CN-LNG: Carbon Neutral LNG, which is considered to produce no CO2 on a global basis when greenhouse gases emitted in the supply chain from natural gas production to combustion are offset by CO2 absorbed and reduced in a separate process from the value chain. *2 CCUS: Carbon dioxide Capture, Utilization and Storage

Daigas Group’s CO2 Emissions Reduction Roadmap

In Energy Transition 2030, we have declared targets for 2030 and 2050 regarding CO2 emissions in our domestic supply chain and avoided emissions in the whole society, and presented a CO2 emissions reduction roadmap. Through such measures as the 1% introduction of e-methane into existing infrastructure, we will aim to reduce the CO2 emissions of the Daigas Group’s supply chain in Japan by 5 million tons, and 10 million tons of avoided emissions in society as a whole in FY2031.3 through the Group’s activities. After the introduction of e-methane in FY2031.3, we will pursue decarbonization through its wider use.

Daigas Group’s CO2 Emissions Reduction Roadmap

Introduction of ICP

Osaka Gas introduced the concept of “Environmental Management Efficiency” in 2003, which is used to quantify the environmental impact of business activities by converting environmental impacts per volume of gas produced into monetary values.
In addition, from FY2022.3, we have adopted internal carbon pricing (ICP) to identify the carbon impact of our invested projects.
From FY2024.3, we also reference ICP when making decisions on new investments in business fields that have a large carbon impact.

Joint investment in forest fund established by Sumitomo Forestry Group

In July 2023, Osaka Gas announced its joint investment, along with nine other Japanese companies, in the Eastwood Climate Smart Forestry Fund I (“the Fund”) established by the Sumitomo Forestry Group.
The pooled capital amounts to approximately ¥60.0 billion and will be invested over 15 years. By 2027, the pooled capital will have been invested in the acquisition and management of 130 thousand hectares of forest, primarily in North America. With a target of sequestering an additional 1 million tons of carbon dioxide a year, the Fund will promote the production and trading of high-integrity carbon credits, which will contribute to the realization of a decarbonized society.
The Fund will deliver global climate benefits by supporting responsible forest management at a spatial and financial scale beyond that which individual companies could achieve on their own.

①Low Carbon Transition with the Advanced Utilization of Natural Gas

The Daigas Group is proceeding with fuel conversion from coal and oil, etc. to natural gas, which emits less CO2, and with the introduction of energy-saving technologies (cogeneration, etc.). The Group is thus contributing to CO2 reduction in society as a whole. We are undertaking the fuel conversion not only in the Kansai area, but throughout other parts of Japan and in the Asian region, and will expand this activity even further going forward.

gas cogeneration

Contribution to low carbon transition with the introduction of gas cogeneration systems

The Group is contributing to low carbon transition through the introduction of gas cogeneration systems to customers. Cogeneration systems generate power with city gas and use the waste heat generated for other applications such as cooling and heating, hot water supply, and steam, thus realizing high overall energy efficiency of 70-90%. Since the initial introduction in 1982, we have installed systems totaling 1.50 GW. In March 2022, we developed a new and improved gas cogeneration system that offers even higher power generation efficiency. This new system will also contribute to power security because gas can be used to generate power during blackout.

Approach to Avoided Emissions in Society

The following sums up our approach to avoided emissions in society. For example, we can reduce approximately 45% of CO2 emissions with the switch from coal to natural gas. However, if we have supplied the natural gas, our gas sales volumes increase, which means an increase in Scope 3 CO2 emissions according to the GHG Protocol*1 that is commonly used by companies to calculate their CO2 emissions. For this reason, in the transition phase until 2030, our CO2 emissions will increase by promoting fuel conversion from oil and coal to natural gas. On the other hand, by switching to natural gas, CO2 emissions per the same calorific value will be reduced, which means that we can contribute to CO2 emissions reduction in the whole society. However, under the current GHG Protocol, there is no way of evaluating the CO2 reduction effect on society as a whole through contributions to other parties.
To steadily promote the transition to low-carbon/decarbonization together with our many customers, we believe that it is important to understand our progress with an indicator that shows the effect of CO2 emissions reduction in the whole society (avoided emissions) and to obtain the understanding of our stakeholders.

  • *1 International standard for calculating and reporting GHG emissions
  • CO2 emissions per same caloric value*2 CO2 emissions per same caloric value *2 Prepared based on the "Ordinance Concerning Calculation of GHG Emissions from Business Activities of Specified Emitters" issued by METI and the Ministry of the Environment

    What is “avoided emissions”? What is “avoided emissions”?

  • Avoided emissions calculation example Avoided emissions calculation example

②Initiatives for the Social Implementation of e-methane — Efforts for Transition toward 2030 —

The Daigas Group believes that e-methane, which is synthesized from hydrogen produced with renewable energy and CO2, will be the key to realizing the carbon neutralization of city gas. The value offered by e-methane includes reducing additional social costs. The Group is implementing various initiatives toward the social implementation of e-methane.

Supply Chain and Cost Benefits of the Social Implementation of e-methane

“e-methane” is considered as a carbon-neutral energy because it is produced by recycling CO2 emitted into the atmosphere and synthesizing it with hydrogen, and does not increase atmospheric CO2 even when combusted.
Furthermore, since “e-methane” has almost the same composition as city gas, existing city gas infrastructure and customers‘ combustion equipment can be used without modification, enabling seamless decarbonization from the transition period. This has the advantage of reducing social implementation costs.

e-methane Supply Chain e-methane Supply Chain *1 Biogenic CO2 and possibly CO2 derived from DAC (Direct Air Capture: a technology used to capture and remove CO2 directly from the atmosphere) might be utilized in the future *2 Carbon dioxide Capture and Utilization

Four Value Propositions of e-methane

“e-methane” offers four value propositions that contribute to customers and society. Based on these values, the Group aims to introduce "e-methane" accounting for 1% of the Group’s gas sales as of FY2031.3.

Four value propositions Four value propositions

e-methane Supply Chain Development in Japan and Overseas

For the full-scale introduction of e-methane in 2030, the Daigas Group will consider establishing diverse methanation technologies, developing renewable energy sources, and building a supply chain both in Japan and overseas, including the procurement of hydrogen and CO2 in collaboration with customers.
We will study the introduction of e-methane primarily in the city gas supply area in the Kansai region and comprehensively verify necessary elemental technologies and feasibility of the supply chain, in our aim to establish the optimal supply model for e-methane. In addition to supply chain development in Japan, we view the building of a supply chain overseas as another promising option for the introduction of e-methane. In collaboration with business operators both in Japan and overseas, we are conducting several feasibility studies and basic design work regarding the building of such a global supply chain. For stable procurement in the future, we are identifying locations suitable for e-methane production, focusing our consideration on North America, South America, Australia, the Middle East, and Southeast Asia, where existing natural gas and LNG facilities can be used. We will also promote more widespread use of e-methane in Asia as a new location of use.

e-methane Supply Chain Development

Methanation technology development

①Sabatier methanation*1(existing technology)
Scaled up and implemented in society at an early stage
②Biomethanation*2(innovative technology)
Produce and use energy locally for local consumption
③SOEC methanation*3(Innovative technology)
Reduce cost by enhancing energy efciency

Roadmap for Social Implementation of Methanation Technology Roadmap for Social Implementation of Methanation Technology *1 CO2 conversion by a catalytic reaction with hydrogen derived from renewable energy, etc. to synthesize methane. *2 Technology that uses biological reactions to synthesize methane from CO2 and hydrogen *3 Use of SOEC equipment to electrolyze water and CO2 into hydrogen and carbon monoxide using renewable energy, etc., and then synthesize methane by catalytic reaction of the hydrogen and carbon monoxide.

Supply Chain Development Overseas

The United States
A joint study is underway on the production of e-methane using biomass-derived CO2 from a bioethanol plant and blue hydrogen derived from natural gas through the reforming process.
(Main operators: Osaka Gas USA Corporation, Tallgrass MLP Operations, LLC, Green Plains Inc.)
A joint study is underway on the production of e-methane near the Cameron LNG facility.
(Main operator: Osaka Gas, Tokyo Gas Co., Ltd., Toho Gas Co., Ltd., Mitsubishi Corporation)
Southeast Asia
A joint study is underway in Malaysia on the production of e-methane that is not affected by renewable electricity prices, using methanation by converting biomass, such as unutilized forest resources, into gas.
(Main operator: Osaka Gas, IHI Corporation, PETRONAS Global Technical Solutions Sdn. Bhd.)
A joint study is underway on the production of e-methane using CO2 captured from exhaust gas in industrial areas and natural gas liquefaction plants and green hydrogen generated through water electrolysis powered by renewable energy.
(Main operator: Osaka Gas Australia Pty. Ltd., Santos Ltd)
South America
joint study is underway at PERU LNG’s plant on the production of e-methane using green hydrogen produced through water electrolysis using renewable energy and CO2.
(Main operator: Osaka Gas, Marubeni Corporation, PERU LNG S.R.L.)

③Carbon Neutral Initiatives in the Electricity Business
— Efforts for Energy Transition toward 2030 —

Low-Carbon/Carbon-Neutral Transition of Power Sources

We are promoting the development of a wide range of renewable energy sources such as wind, solar, and biomass together with various partners nationwide, aiming for 5 GW of renewable energy development contribution, *1 one of our targets for FY2031.3.
We are also working on initiatives for storage batteries and VPP utilization, as well as the low-carbon/carbon-neutral transition of thermal power plants needed as dispatchable sources.

  • *1 Including power sources under the feed-in tariff (FIT) system.

Energy conservation and grid stabilization with VPP

A VPP is a system that uses IoT-based energy management technology to control distributed energy resources remotely and in an integrated manner, thereby adjusting the supply-demand balance of electricity like a single virtual power plant.
The Daigas Group is pursuing initiatives to contribute to gird stabilization in a society with the mass introduction of renewable energy. In June 2022, we launched a verification project to build a VPP using our residential fuel cell,ENE-FARM.

Major initiatives to develop and spread renewable energy sources Major initiatives to develop and spread renewable energy sources

④Initiatives Concerning CO2 Capture, Utilization, and Storage

The Daigas Group aims at contributing to a circular society that reduces customers' CO2 emissions and environmental burdens by reusing emitted CO2 in the atmosphere (CCU*2 ) and supplying e-methane produced by methanation. We are also pursuing initiatives such as joint studies in Japan and overseas on establishing a CO2 value chain and injecting and storing surplus CO2 deep underground by CCS.*3

  • *2 CCU : Carbon dioxide Capture and Utilization
  • *3 CCS : Carbon dioxide Capture and Storage

Conceptual Diagram of CO2 Value Chain Conceptual Diagram of CO2 Value Chain *4 H-to-A industries: Industries. where CO2 emissions reduction is difficult (hard-to-abate)

Initiatives for CO2 Value Chain Development

To develop a CO2 value chain, Daigas Group commenced a joint study on the capture, transport, utilization, and storage of CO2 emitted from domestic plants and factories in hardto- abate industries, such as steel, cement, and chemicals.

  • A joint study on CO2 value chain development

    Osaka Gas and Mitsubishi Heavy Industries, Ltd. (MHI) have entered into an agreement to conduct a feasibility study on the development of an efficient CO2 value chain, leveraging Osaka Gas’s expertise in e-methane production and CO2 storage and MHI’s expertise in CO2 capture, vessel transport of liquefied CO2, and CO2 management.

  • A joint study on CCS value chain development with Shell

    Osaka Gas and Shell Singapore Pte. Ltd. have commenced a joint study on the development of a CCS value chain, in which CO2 is captured from emi ssions by industrial facilities in Japan and injected into underground storage overseas.

  • A joint study on the capture and utilization of CO2 emissions from the Senboku Industrial Complex

    Osaka Gas and Mitsui Chemicals, Inc. have commenced a joint study on a project to capture and utilize CO2 emitted from the Senboku Industrial Complex.