Reducing CO2 emissions in response to climate change,
promoting the use of renewable energy, and so forth

Basic concepts

Recognizing the risk of climate change as our Group’s greatest risk, we will encourage the incorporation of energy-saving vehicles (trains and buses) and the use of renewable energy to promote a modal shift, and expand the certificate acquisition and development of green buildings.

Reducing carbon emissions and saving energy and resources

Reducing carbon emissions across the Group

The Group has set a goal of reducing CO2 emissions by 46% or more compared to FY2013. Emissions for FY2022 were 192,162 t, which is a 38% reduction when compared to 309,902 t in the base year of FY2013. In particular, our energy intensity (denominator: distance traveled), which measures the efficiency of our railways, has been reduced by 5.5% over the past five years, while our energy intensity (denominator: total floor space) that measures the efficiency of our real estate has been reduced by only 1.0%.
We will continue to introduce energy-efficient vehicles as well as energy-efficient equipment in our real estate and distribution facilities to achieve the goals of the "Nankai Environmental Vision 2030." The Group has set a target of practically zero CO2 emissions by 2050, and will consider and enact all possible measures, including not only ways to conserve energy, but also the introduction and utilization of renewable energy, energy creation, and alternative energy, and the use of carbon offsets.

Supporting recommendations from the Task Force on Climate-related Financial Disclosures (TCFD)

We have set "reducing climate change" as part of the Nankai Environmental Vision 2030 and are implementing measures to save greenhouse gas emissions.
The average temperature has risen worldwide, causing extreme high temperatures and more frequent rainfalls and floods and creating what we can call a climate crisis. In view of this, we have launched initiatives to enhance our risk management while incorporating the projected impact of climate change on our businesses, and incorporating the measures into our business strategy. In September 2021, we agreed to the recommendations of the Task Force on Climate-related Financial Disclosures (TCFD)* that aims to reduce the risk of the financial market being destabilized by climate change.

*Established in 2015 by the Financial Stability Board, an international organization. It advises companies on how to evaluate their own business risks and opportunities caused by climate change, to understand the financial impact, and to disclose relevant information.

Third-party review of environmental performance results

To enhance the reliability of its environmental impact data, the Group has obtained third-party assurance from Deloitte Tohmatsu Sustainability Co., Ltd. regarding the "Calculation Report on CO2 Emissions from Energy Consumption by Nankai Electric Railway Company and its 54 Consolidated Subsidiaries (FY2021)" for the FY2021 actual CO2 emissions from energy use (Scopes 1 and 2).


April 28, 2023 third-party assurance report (PDF:2,285KB)


Understanding CO2 emissions through the supply chain (Scope 3)

In addition to CO2 emissions from the Group’s business activities (Scopes 1 and 2), we have calculated FY2021 results for indirect emissions generated in the supply chain (Scope 3). The results showed that purchased products and services accounted for approximately 60% of the total.

Scope 3 CO2 emission data by category (FY2021 results)

(Unit: t-CO2)

1. Products and services
439,118 Downstream
9. Transportation, shipping
2. Capital goods 82,124 10. Processing of
products sold
3. Fuel and energy related
activities not included in
Scopes 1 and 2
37,161 11. Use of products sold 16,282
4. Transportation, shipping
12. Disposal of
products sold
5. Waste from business 8,129 13. . Leased assets
6. Business trips 1,155 14. Franchises
7. Employee commuting 2,110 15. Investment 19,470
8. Leased assets (upstream) Total 745,051

* Supply chain: A series of processes involved in the procurement, manufacture, logistics, sale, and disposal of products and other goods in business activities.
* Categories 4, 8, 9, 10, 12, and 14 are excluded from importance.
* Not guaranteed by any third party

Saving railway electricity

The electricity consumption of our railways in FY2022 was 211,167,000 kWh (a decrease of 1.0% compared to FY2021). Of this, the amount used for operations was 183,373,000 kWh, accounting for 86.8% of the total amount, and the remaining ancillary electricity consumption was 27,794,000 kWh. Overall, the electricity consumption for railways decreased by 12.8% in FY2022 when compared to FY2012. Ancillary electricity is energy used for signal equipment, railroad crossings, and station facilities (lighting, air conditioning, elevators, etc.). We have been making efforts to conserve energy, such as saving energy during summer and winter months (strict adherence to room temperatures, etc.) and changing station light fixtures to LEDs.

Regenerative braking and VVVF control

"VVVF control" is the control of AC motors through voltage and frequency variation to determine train acceleration and speed. It does not use electrical resistance like conventional trains, which allows for control that is very energy efficient.
Furthermore, "regenerative braking" is a mechanism that makes the motors act as power generators when a train brakes. This generated energy is returned to overhead wires to be supplied to other trains running in the vicinity. This conserves the amount of consumed energy because it reuses the electricity that has been generated.
These systems reduce the use of electricity compared to conventional trains, so we are promoting the use of trains equipped with this system.

Adopting a collective power supply system for both incoming and outgoing lines, and phase capacitators to improve power factor

By connecting the power supply lines (to trains) for outgoing and incoming lines, we have reduced power supply resistance, which in turn reduces power losses from power lines. This allows regenerated current from regenerative brakes to run through the connection point, allowing outgoing and incoming trains to efficiently use the power to save the total power consumption. The use of phase capacitators to improve power factor also reduces power loss, improving power efficiency.

VVVF-controlled series 12000
Energy-efficient series 8000

Energy conservation measures in real estate and distribution facilities

From FY2022 to FY2024, we plan to replace existing facilities with energy-saving equipment. Specifically, we are considering replacing heat source equipment that services the entire Nankai Terminal Building with equipment that is more efficient, and are also deliberating on the reduction of life-cycle costs by changing our equipment to the appropriate capacity and number of units according to the current load capacity. We are also considering cutting down on the electricity consumed by suppressing transporting power. This will be done by installing inverters that enable operation control according to the workload of pumps supplying cold water to all areas of large-scale facilities. Along with the renewal of these facilities, we also plan to automate equipment control, optimize operations, enable the visualization of these systems, and further cut down on energy consumption by installing heat source controllers and the Building Energy Management System (BEMS).

Cable cars run 100% on renewable energy (the first of such cable cars in Japan)

As part of our efforts to promote CO2 emission reduction of the Cable Line (Koyasan cable cars), we have been operating the line on 100% renewable energy by applying the "Renewable Energy ECO Plan" by Kansai Electric Power from June 2021. This initiative reduces CO2 emissions by approximately 60 t per year. This is the first instance of a cable car in Japan operating on 100% renewable energy.
*The Renewable Energy ECO Plan is a plan to use solar power, hydraulic power, wind power, and other power sources with added environmental value that are sourced from non-fossil trade market by Kansai Electric Power. By using this plan, the power used can be effectively deemed as power generated by renewable energy. Under the system to calculate, report, and publish the amount of greenhouse gas emissions in the Act on Promotion of Global Warming Countermeasures, the amount of carbon emissions from the power used under the plan can be calculated by setting the carbon emission coefficient as zero.

The exterior of Cable Line (Koyasan Cable Car)

Operating environmentally friendly buses

In the bus business, three fuel-cell buses powered by hydrogen as an alternative energy source to light oil were introduced in FY2021 (two Tokushima buses and one Nankai bus), and two electric buses (Nankai bus) were introduced in FY2022 and are in operation.
Going forward, we will "contribute to preserving the global environment," reducing environmental stress, and aiming for the realization of a sustainable society.

Using solar power

Regarding the use of solar energy, solar power generation systems have been installed in areas such as platform awnings at Hagoromo Station, Izumiotsu Station and Izumisano Station on the Nankai Line. Approximately 30% of the electricity consumed daily at the Izumiotsu Station is covered by the solar power.

Tannowa Solar Power Plant

Promotion of Park & Ride

CO2 emissions by trains are only 1/5 that of private cars.* We are making efforts to reduce CO2 emissions by promoting the use of public transport with Park & Ride initiatives.
*Source: The Ministry of Land, Infrastructure, Transport and Tourism website (carbon emissions in the transportation division)

Registered as a ZEH developer

We are registered as a ZEH developer as designated by the Sustainable open Innovation Initiative.

*ZEH [net-zero energy house "(zecchi)"] are houses with greatly improved insulation in the outer walls that adopt efficient utility systems to maintain quality indoor environment and to save energy significantly, while introducing renewable energy to cancel out the primary annual energy consumption as net zero.

*A ZEH developer is a home owner (condominium developer, owner, etc.) or construction company (general constructor, home builder, and other constructors) who serves a central role in forming ZEH-M projects and in releasing the initiative plan to promote ZEH-M, its progress, the ZEH-M deployment plan, and the ZEH-M building record to the public based on the purpose of the ZEH verification project.

Information disclosure by answering CDP

The Carbon Disclosure Project (CDP) is a partnership of institutional investors requesting that companies disclose their climate change strategies and details of their greenhouse gas emissions. We respond to CDP questionnaires on climate change and water every year.

our company’s CDP score 2018 2019 2020 2021 2022
Climate change B B B B B
Water A- B B B B

Agreeing to the national campaign of COOL CHOICE

Delivery lockers at Kaizuka Station

We have agreed to "COOL CHOICE (wise choice)," a national campaign endorsed by the government, and "COOL CHOICE - Campaign to Receive All Deliveries in One Go (project for all to stop re-deliveries)."

We are actively introducing specific measures, including installing delivery lockers (in Suminoe Station, Izumiotsu Station, Kishiwada Station, Kaizuka Station, Mikunigaoka Station, Shirasagi Station, and Kongō Station), introducing energy-saving train cars, promoting park and ride, switching to LED lighting, and promoting green purchase.

The Paris Agreement, an international framework for measures against global warming from 2020 onward, was adopted in 2015 with all countries participating. The aim was to limit the global temperature increase to below 2 degrees, make efforts to keep it at 1.5 degrees, and reduce net greenhouse gas emissions to zero in the last half of the century.

"COOL CHOICE" is an initiative to reduce greenhouse gas emissions that encourages people to make "wise choices" that contribute as measures against global warming, such as replacing products, using services, and adopting lifestyles that contribute to a decarbonized society.

*Redelivering packages increases environmental stress and social losses, so new initiatives were needed to reduce re-deliveries.
In response, the Ministry of the Environment launched "COOL CHOICE - Campaign to Receive All Deliveries in One Go" in March 2017, asking people and private sectors to join the campaign.

Sustainability Site Map

Major sustainability themes