Policy and Basic Concept
As a global healthcare company, the Eisai Group has established the “ENW (Eisai Network Companies) Environmental Policy” and is working to reduce the environmental impact of its business activities. The policy states: “3. Contribute to the mitigation of climate change by reducing greenhouse gas emissions and promoting energy conservation.” In line with this policy, we are advancing initiatives toward the realization of a decarbonized society.
The Eisai Group will advance its initiatives in line with the policies and regulations that promote climate change mitigation and the transition to a decarbonized society, including reductions in greenhouse gas emissions and the expansion of renewable energy, with a view to contributing to the achievement of the goals of the Paris Agreement and the Nationally Determined Contributions (NDCs) established by individual countries and regions.
Based on scientific knowledge, we also place importance on aligning our climate-related initiatives with the Paris Agreement’s 1.5°C goal. We participate in climate-related initiatives and work to understand climate-related policy developments and contribute to policy discussion through information exchange and participation in activities with industry associations and other organizations, including the Federation of Pharmaceutical Manufacturers’ Associations of Japan (FPMAJ) and the Japan Pharmaceutical Manufacturers Association (JPMA).
With respect to climate-related policies and policy recommendations issued by industry associations and other organizations of which we are a member, we review, as necessary, their alignment with our Environmental Policy and climate-related targets. Where a material divergence is identified, we will consider appropriate actions, such as engaging in dialogue with the relevant organization or communicating our views.
As part of these efforts, in November 2023, the Eisai Group received approval from the Science Based Targets initiative (SBTi) for its 1.5°C-aligned science-based targets for greenhouse gas emissions reductions, consistent with the 1.5°C goal of the Paris Agreement. In December 2023, we were approved by the Japan Climate Initiative (JCI) to join the JCI Race to Zero Circle*2, committing to achieving net-zero emissions*1 by 2050. In addition, in September 2021, Eisai joined RE100, a global initiative that brings together companies committed to transitioning the electricity used in their business operations to 100% renewable energy. Eisai aims to achieve its RE100 target by FY2030.
We are working toward the achievement of these medium- to long-term targets by further strengthening collaboration not only within the Eisai Group but also with our business partners.
*1 Net Zero (as defined by the SBTi Net-Zero Standard)
Reducing Scope 1, 2, and 3 emissions to zero or to a residual emissions level that is consistent with reaching net-zero emissions at the global or sector level in eligible 1.5°C scenarios or sector pathways.
Neutralizing any residual emissions at the net-zero target year and any GHG emissions released into the atmosphere thereafter.
*2 The JCI Race to Zero Circle concluded its activities following the conclusion of the Race to Zero campaign on August 6, 2026. Eisai participated in the Circle from December 2023, when its participation was approved, through the end of the Circle’s activities.
Targets, Issues and Actions
| Targets | Issues | Actions | Results（FY2025） |
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Climate change mitigation
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*3 Limited to externally purchased electricity.
*4 Greenhouse gas emissions increased as a result of revisions to the data included in the calculation and changes to the calculation methodology.
SBT (Science Based Targets: targets for reducing greenhouse gas (GHG) emissions based on scientific grounds)
The Eisai Group has set medium- to long-term greenhouse gas emission reduction targets shown below (SBT 1.5°C target*5) based on scientific grounds to help mitigate climate change and is working to reduce CO2 emissions derived from its business activities.
- Reduce Scope 1+2 GHG emissions by 55% by FY2030 (compared to FY2019)
- Reduce Scope 3, Category 1 GHG emissions by 27.5% by FY2030 (compared to FY2019)
Activities to achieve Net-Zero by 2050
In FY2025, we continued to advance a wide range of initiatives globally to reduce greenhouse gas emissions. These included ongoing energy conservation, a shift toward electrification, the adoption of renewable energy, efforts to achieve 100% adoption of hybrid and electric vehicles for sales fleets in Japan, the steady promotion of environmental investments supported by Internal Carbon Pricing (ICP), and engagement with suppliers.Furthermore, toward achieving our SBT 1.5°C target for FY2030 and net-zero emissions by 2050, we further refined our “Transition Plan for Climate Change Mitigation.” We developed a concrete and actionable plan incorporating scenario analysis, assessment of climate-related risks and opportunities, strategies and roadmaps for reducing greenhouse gas emissions, alignment with financial and investment planning, and the establishment of governance structures. Beginning in FY2026, we have incorporated the transition plan into our annual capital investment planning and are advancing initiatives in accordance with the plan.
Transition Plan for Climate Change Mitigation
Key Initiatives
1) Energy transition and energy conservation
(Introduction of high-efficiency equipment and operational improvements)
Transition to lower-emission energy sources: light/heavy fuel oil → gas → electricity, and the use of non-fossil fuels
Introduction and efficient operation of high-efficiency equipment
2) Transition of sales fleets to hybrid and electric vehicles
3) Introduction of renewable energy
Estimated Investment and Expected CO₂ Emissions Reductions
Under our three-year plan from FY2026 to FY2028, we estimate cumulative environmental investments related to decarbonization, including equipment upgrades, at approximately JPY 5 billion. We will promote energy transition and energy conservation and the introduction of renewable energy, while considering the transition of sales fleets to hybrid and electric vehicles. These initiatives are expected to achieve cumulative CO₂ emissions reductions of approximately 7,000 tons over the three-year period.
＊The Eisai Group will prioritize reducing GHG emissions across its entire value chain. At the net-zero target year of 2050, for any residual emissions that are difficult to abate, we will consider appropriate measures to neutralize such emissions, taking into account advances in the development and practical application of emerging technologies, as well as the potential use of high-integrity carbon removal credits and other eligible carbon removal solutions.
Structures and Systems
The Eisai Group has established a global environmental management framework to promote environmental initiatives globally.
In addition to promoting global activities, we are enhancing efforts to identify and assess environmental risks both in Japan and internationally, and to develop effective countermeasures.
Promotion Structure and Environmental Audit
https://www.eisai.com/sustainability/environment/management/structure/index.htmlInitiatives
As part of our specific initiatives, at the Kawashima Plant (Gifu Prefecture, Japan), we installed heat pumps for air-conditioning systems in the No. 3 Formulation Building, while the Cafeteria and Administration Building has obtained ZEB*6 certification.
At our overseas sites, the Suzhou Plant (China) discontinued the use of boilers in February 2025 and switched to steam supplied via a municipal pipeline, resulting in a reduction of approximately 350 tons of CO₂ emissions in FY2025. In addition, since March 2024, the plant has been fully operating an energy management system to optimize electricity consumption by collecting and analyzing equipment operating data.
At the European Knowledge Centre (UK), the site switched from natural gas to biogas, resulting in a reduction of approximately 1,900 tons of CO₂ emissions in FY2025. We will continue to promote the introduction of renewable energy, primarily at our factories and research laboratories in Japan and overseas.
In Eisai Co., Ltd.’s sales division, we promote remote engagement with healthcare professionals and encourage the use of public transportation for sales activities. By the end of FY2024, we achieved a 100% transition of our domestic sales fleet to hybrid and electric vehicles, and maintained this level throughout FY2025.
Furthermore, in FY2022, the Eisai Group introduced an Internal Carbon Pricing (ICP) system, which assigns a monetary value to CO₂ emissions reductions and incorporates this value into investment decision-making, and we continue to utilize the system. The internal carbon price was set at JPY 11,000 per ton of CO₂ (EUR 80 at the time of introduction in 2022), with reference to carbon taxes and emissions trading prices in Europe, and is used to assess the environmental value of capital investments.
As a RE100 member, we also participate in policy advocacy activities aimed at accelerating the expansion of renewable energy. In FY2023, as a member of the RE100 Japan Policy Working Group organized by Climate Group, we contributed to the development of policy recommendations aimed at further promoting renewable energy in Japan.
In addition, we participate in environmental initiatives led by the Federation of Pharmaceutical Manufacturers’ Associations of Japan (FPMAJ). Through activities such as providing greenhouse gas emissions data and sharing industry-wide environmental data and examples of initiatives and best practices among member companies, we contribute to the decarbonization of the pharmaceutical industry as a whole.
*6 Abbreviation for Net Zero Energy Building (ZEB). A building that aims to achieve a comfortable indoor environment while achieving a net annual primary energy balance of zero.Data
Data
SBT (Science Based Targets: targets for reducing greenhouse gas (GHG) emissions based on scientific grounds)
Toward achieving our SBT 1.5°C target, the entire Eisai Group is steadily advancing efforts to reduce greenhouse gas emissions. In FY2025, Scope 1 and 2 emissions totaled 43,906 tons, representing 88.5% of the previous fiscal year's level. Emissions decreased by 58.3% compared with FY2019, reaching a level consistent with our FY2030 SBT 1.5°C target.
Note: The actual Scope 1 and 2 emissions for FY2019 are different from the Scope 1 and 2 emissions for the base year (FY2019) of the SBT 1.5°C target, which is 102,512 tons, due to adjustments to the boundary after FY2023, etc.
Efforts Concerning Company Vehicles
In FY2025, CO₂ emissions from sales vehicles totaled 10,524 tons globally, a decrease of approximately 15.6% from the previous fiscal year, despite the continued expansion of our core businesses worldwide.
In Japan, Eisai Co., Ltd. and EA Pharma Co., Ltd. maintained a 100% adoption rate of hybrid and electric vehicles in their sales fleets, with CO₂ emissions remaining at approximately the same level as the previous fiscal year.
In the United States, the transition from internal combustion engine (ICE) vehicles, primarily gasoline-powered vehicles, to hybrid vehicles progressed, resulting in an approximately 20.3% reduction in CO₂ emissions compared with the previous fiscal year. In EMEA, the transition from diesel vehicles to hybrid vehicles resulted in an approximately 11.0% reduction in CO₂ emissions compared with the previous fiscal year.
Going forward, we will continue to systematically introduce hybrid and electric vehicles across our global operations and further reduce CO₂ emissions.
Eisai Co., Ltd. has been progressively transitioning its sales fleet to HV (hybrid vehicles), and in FY2024 the adoption rate increased to an annual average of 96.1%. The introduction of electric vehicles has also begun, and combined with HV, 100% of our sales fleet now consists of environmentally friendly vehicles.
On the other hand, CO2 emissions from company vehicles were 1,736 tons, a increase of 10.0% compared to the previous year, partly due to intensified sales activities for new products In addition to the use of low-emission vehicles, we continue to leverage remote meetings with healthcare professionals using digital tools to further reduce CO₂ emissions from vehicle use.
Progress in introducing renewable energy
The Eisai Group is actively promoting the adoption of renewable energy across its global operations. On-site solar power generation facilities are in operation at the Kawashima Plant and Kashima Plant in Japan, the Exton Site in the United States, and the Vizag Site in India. At the Suzhou Plant in China, we also utilize electricity procured through a Power Purchase Agreement (PPA). In addition, we have actively promoted the use of 100% renewable electricity plans, as well as the purchase of non-fossil certificates in Japan and renewable energy certificates overseas.
As a result of these initiatives, the renewable energy adoption rate for electricity used in our business activities remained at a high level of 99.7% for externally purchased electricity.*7
*7 When electricity generated by fossil fuel-based cogeneration systems is included in total electricity consumption, the renewable energy adoption rate is 99.2%.
Efforts to reduce Scope 3 emissions
For Scope 3, Category 1 emissions from purchased goods and services, we refined the scope of data and calculation methodology when setting our SBT 1.5°C target in FY2022. We further improved accuracy of our calculations in FY2024 and FY2025 by reviewing the data included in the calculation and revising the calculation methodology.
As a result, Category 1 emissions in FY2025 amounted to 759,554 tons, representing a 66.4% increase compared with FY2019 and an 8% decrease compared with the previous fiscal year. Category 1 accounted for 89% of our total Scope 3 emissions of 852,159 tons.
Going forward, we will further reduce Scope 3 emissions by strengthening collaboration with suppliers and establishing calculation methods that better reflect actual emissions, including by incorporating primary data from suppliers on actual CO₂ emissions reductions into our calculations.
Note: The actual Scope 3 emissions for FY2019 differ from the Scope 3 emissions used as the base year for our SBT 1.5°C target. The FY2019 base-year emissions for the SBT 1.5°C target are 548,122 tons, reflecting boundary adjustments made since FY2023 and other revisions.
CDP Climate Change Report 2025
CDP is an international non-profit organization that evaluates and discloses corporate efforts to address environmental risks—including climate change, water security, and deforestation— in response to requests from institutional investors worldwide. Since 2015, the Eisai Group has responded to the CDP Climate Change questionnaire.
In the CDP Corporate Questionnaire 2025, we received the highest rating of “A” (Leadership level) for both climate change and water security for the second consecutive year, on an eight-level scale ranging from “A” and “A−” to “D” and “D−.”
In addition, our efforts to promote environmentally conscious business practices across the supply chain and engage with suppliers were highly recognized, and Eisai was selected as a “Supplier Engagement Leader” for the second consecutive year.
