Reducing CO2 emissions to address climate change,
Promoting the use of renewable energy, etc.
Basic Concept
We regard climate change risk as one of the greatest risks facing our Group, and will promote modal shifts by introducing energy-efficient vehicles (trains and buses) and using renewable energy, while also expanding the acquisition and development of green buildings.
CO2 reduction and energy/resource conservation activities
Towards "carbon neutrality by 2050"
The Group has set a goal of reducing CO2 emissions by more than 46% by fiscal 2030 compared to fiscal 2013 levels.
Emissions for fiscal year 2025 are projected at 214,771 tons, representing a 30.7% reduction compared to the base year of 2013, which was 309,902 tons.
Going forward, we will continue to introduce energy-saving vehicles and promote the installation of highly energy-efficient equipment in our real estate and distribution facilities, aiming to achieve the goals of the "NANKAI Group Environmental Vision 2030." Our group has set a target of achieving net-zero CO2 emissions by 2050, and we will consider and implement all possible measures, including energy conservation measures, the introduction and utilization of renewable energy, energy creation, and alternative energy, as well as the use of carbon offsetting.
Supporting the recommendations of the Task Force on Climate-related Financial Disclosures (TCFD)
The world is facing a climate crisis, with rising average temperatures, extreme heat, and increasing frequency of heavy rain and flooding. Therefore, we have begun efforts to strengthen risk management in anticipation of the impact of climate change on our business and to integrate these measures into our business strategy. In September 2021, we endorsed the recommendations of the Task Force on Climate-related Financial Disclosures (TCFD)*, which aims to reduce the risk of financial market instability caused by climate change.
Established in 2015 by the international organization, the Financial Stability Board, the initiative recommends that companies assess their own business risks and opportunities arising from climate change, understand the financial impact, and disclose that information.
Environmental impact data certified by a third party
To enhance the reliability of our environmental impact data, our group has been obtaining third-party assurance for energy-related CO2 emissions (Scope 1 and 2) since fiscal year 2021. In fiscal year 2024, we also obtained third-party assurance for our "Energy-Related CO2 Emissions Calculation Report" from Deloitte Tohmatsu Sustainability Ltd.
"Independent Third-Party Assurance Report"
Nankai Group Energy-Related CO2 Emissions Calculation Report (FY2024) (PDF: 2,264KB)
Nankai Group Energy-Related CO2 Emissions Calculation Report (FY2023) (PDF: 1,318KB)
Nankai Group Energy-Related CO2 Emissions Calculation Report (FY2022) (PDF: 2,756KB)
Identifying CO2 emissions throughout the supply chain (Scope 3, FY2024)
In addition to CO2 emissions from our group's business activities (Scope 1 and 2), we have been calculating indirect emissions (Scope 3) generated in our supply chain since fiscal 2021. Over the past three years, purchased products and services account for approximately 60% of these emissions.
(Unit: t-CO2)
| Upstream (Procurement) | 1. Purchased products and services | 500,265 | Downstream (sales) | 9. Transportation and distribution (downstream) | – |
|---|---|---|---|---|---|
| 2. Capital goods | 123,745 | 10. Processing of sold products | – | ||
| 3. Not included in Scope 1 or 2 Fuel and Energy Related Activities | 37,598 | 11. Use of sold products | 18,811 | ||
| 4. Transportation and distribution (upstream) | – | 12. Disposal of sold products | – | ||
| 5. Waste generated from business operations | 6,142 | 13. Leased assets (downstream) | 114,103 | ||
| 6. Business trips | 1,202 | 14. Franchise | – | ||
| 7. Employee Commuting | 2,195 | 15. Investment | – | ||
| 8. Leased assets (upstream) | – | total | 804,061 | ||
* Supply chain: A series of steps involved in business activities, including procurement, manufacturing, logistics, sales, and disposal of products.
*Categories 4, 8, 9, 10, 12, 14, and 15 have been excluded due to their importance.
*Not guaranteed by a third party
Energy-saving measures for railway facilities and vehicles
In fiscal year 2025, railway electricity consumption was 234,326 thousand kWh (a 2.1% decrease compared to fiscal year 2024). Of this, 203,807 thousand kWh was used for operation, accounting for 87.0% of the total, while the remaining 30,519 thousand kWh was for incidental use. Overall, railway electricity consumption in fiscal year 2025 was reduced by 11.6% compared to fiscal year 2013. Incidental power refers to electricity used for signaling equipment, level crossing equipment, and station equipment (lighting, air conditioning, elevators, etc.). Efforts to conserve energy are being made, such as saving electricity in summer and winter (strict adherence to indoor temperatures, etc.) and gradually switching station lighting to LEDs.
Regenerative braking and VVVF control
"VVVF control" controls AC motors by changing the voltage and frequency, thereby controlling the acceleration and speed of trains.
Unlike conventional vehicles, it does not use electrical resistance, allowing for highly energy-efficient control.
In addition, "regenerative braking" is a system in which the motor acts as a generator when the train brakes, and the generated electricity is returned to the overhead lines to supply other trains traveling nearby. Reusing the generated electricity can reduce the amount of electricity used.
These methods enable a reduction in electricity consumption compared to conventional vehicles, so we are promoting the introduction of vehicles equipped with both functions.
Adoption of a simultaneous feeding system for both up and down lines and installation of power factor improvement capacitors
By connecting the feeder wires (lines that supply electricity to trains) on the up and down lines, we are reducing the resistance to the feeder wires and reducing the power loss consumed by the wires. This allows the regenerative current generated by regenerative braking to flow through the connection, allowing the up and down trains to use it efficiently and reduce power consumption. Furthermore, by installing a power factor improvement capacitor, we are reducing the loss that occurs when electricity is used and improving power efficiency.
Changes in railway power consumption
Energy-saving measures in real estate and distribution facilities
We have updated our existing facilities to more energy-efficient equipment between fiscal 2022 and fiscal 2024. Specifically, we updated the heat source equipment that powers the entire Nankai Terminal Building to more efficient equipment, and also reduced lifecycle costs by changing to an appropriate capacity and number of units according to the current load capacity.
Furthermore, by installing inverters that enable load-dependent operation control on pumps that supply chilled water to every corner of the large-scale facility, we are reducing the power required for transport and lowering electricity consumption. Along with updating these facilities, we plan to further reduce energy consumption by automating equipment control and optimizing and visualizing operations, including introducing heat source controllers and BEMS (Building Energy Management System), in conjunction with existing equipment.
Operating environmentally friendly buses
In our bus operations, we introduced three fuel cell buses that use hydrogen as an alternative energy source to diesel in fiscal year 2021 (two for Tokushima Bus and one Nankai Bus), and we have been gradually introducing electric buses since fiscal year 2022 (six for Nankai Rinkan Bus in fiscal year 2025), and have started operations.
We will continue Contribute to preserving the global environment by reducing environmental impact and realizing a sustainable society.
Utilization of renewable energy
As part of our efforts to reduce CO₂ emissions, our group is promoting the introduction of renewable energy. Since November 2024, NANKAI has been promoting carbon-free electricity use at Namba Parks and NAMBA SkyO by utilizing electricity (approximately 6 million kWh per year) that it transmits itself from its own Nankai Ominedai Solar Power Plant.
These initiatives have brought the proportion of renewable energy used to approximately 42%. Furthermore, Nankai introduced renewable energy to Kosaku Line (Koyasan Cable Car) in June 2021 and to all six Rapit Rapi:t in April 2024. In addition, they plan to gradually expand the introduction of renewable energy from April 2026, and by fiscal year 2027, they expect to have introduced renewable energy equivalent to the amount of electricity used on all paid trains and at all 105 stations, which will account for approximately 20% of their total electricity consumption.
In addition, our group companies are also making progress, such as switching 100% of the electricity used for Tsutenkaku Tower to renewable energy starting in April 2024. We will continue to explore and implement new ways to utilize renewable energy in the future.
Contribution to modal shift
The CO2 emissions per unit of transport by the railways operated by our group are approximately 1/7th of those of private passenger cars *, and we believe that this is one of the effective means of reducing CO2 emissions from passenger transport.
Our group is developing a public transportation network centered on railways, promoting urban development centered around stations, and contributing to regional development as well as the creation of a carbon-neutral society.
From the Ministry of Land, Infrastructure, Transport and Tourism's "Carbon Dioxide Emissions per Unit of Transport (Passenger) FY2024"
Register as a ZEH developer
We have registered as a ZEH developer as defined by the Environmental Co-Creation Initiative, a general incorporated association.
A ZEH (Net Zero Energy House) is a house that aims to achieve a net zero annual primary energy consumption balance by significantly improving the insulation performance of the exterior shell, introducing highly efficient equipment systems to achieve significant energy savings while maintaining the quality of the indoor environment, and by introducing renewable energy sources.
ZEH developers are building owners (apartment developers, owners, etc.) and construction companies (general contractors, house manufacturers, and other construction companies) who play a central role in forming ZEH-M projects by publicly disclosing their "plans for promoting ZEH-M," "progress," "ZEH-M implementation plans," and "ZEH-M implementation results" based on the purpose of the ZEH (Net Zero Energy House) demonstration project.
ZEH-M implementation record
| Apartment name | location | Completion date | ZEH-M rank |
|---|---|---|---|
| Southern Crest Namba Minami | Osaka City | October 2023 | ZEH-M Oriented |
Information disclosure through responses to CDP
CDP (Carbon Disclosure Project) is a project in which institutional investors work together to ask companies to disclose their climate change strategies and specific greenhouse gas emissions. We respond to CDP questionnaires on climate change and water every year.
| Our CDP Score | 2022 | 2023 | FY2024 | FY2025 |
|---|---|---|---|---|
| Climate change | B | A－ | B | B |
| Water | B | C | B | B |
