Environmental Initiatives

Santen creates a mechanism to contribute to the society through the business as well as to fulfill its social responsibilities, with full recognition of conserving the global environment as one of the most important common challenges of humankind.

Information on environment initiatives is disclosed in Environment Data

Santen Group Environmental Conservation Policy

Santen has established the "Santen Group Environmental Conservation Policy" in order to promote and develop environmental conservation activities globally.

Santen Group Environmental Conservation Policy

To contribute to the conservation of the sustainable global environment based on Santen's Values-Tenki ni sanyo suru(*)-the Santen Group devotes positive efforts to preserving local environments, helping prevent global warming, enhancing the effectiveness of resource use, and conserving biodiversity and forests in all countries/regions where it operates. For this purpose, the group promotes the following initiatives:

  1. Establishing an environmental management system
    We will establish an environmental management system that allows us to conduct activities for environmental conservation effectively and continuously.

  2. Carrying out continuous improvements
    We will assess environmental risks, set targets and plans based on the assessment, and strive to carry out continuous improvements through implementation, examination and review.

  3. Complying with laws and regulations
    We will comply with environment-related law, ordinances and agreements, and also with our voluntarily established environmental standards.

  4. Preventing environmental pollution and reducing environmental loads
  1. To help prevent global warming, we will strive to lower our greenhouse gas emissions, to contribute to achieving a decarbonizing society.
  2. We will promote the waste-related initiative of the 3Rs-reduce, reuse and recycle-and use resources in a sustainable way, to contribute to building a circulating society.
  3. We will promote the preservation and efficient use of water resources.
  4. We will strive to prevent air and water pollution and appropriately manage chemical substances.
  5. We will promote the conservation of biodiversity and forests.
  1. Raising employees' environmental awareness
    We will provide employees with environmental education, and conduct activities to enhance their environmental knowledge, to raise their awareness of environmental conservation.

  2. Disclosing information appropriately
    We will positively disclose information related to our environmental conservation activities.
  • "Tenki ni sanyo suru": Santen's original interpretation of a passage from chapter 22 of Zhongyong (The Doctrine of the Mean) by Confucius, meaning "Exploring the secrets and mechanisms of nature in order to contribute to people' health"

This policy has been approved by the Board of Directors.

Environmental Vision for 2050

We have established "Santen Vision for the Earth 2050" which includes target in 2030 such as the amount of CO2 emissions reduction. Santen makes a full commitment to the following two areas in all countries and regions of its operation. The first commitment area is "Measures against Climate Change", which are aimed at the achievement of net zero greenhouse gas emissions toward the Realization of a Carbon-free Society mainly through technological innovation toward an energy shift and thorough reuse and highly efficient use of resources at plants and other facilities. The second commitment area is "Environmental Load Reduction", which is aimed at the Establishment of a Recycling-based Society mainly through the full utilization of sustainable resources and materials based on technological innovation for all products.

Environmental Targets and Progress towards 2030 for Santen Vision for the Earth 2050

ThemeTargetsProgress in FY2022
Measures against Climate Change

Contribution to a carbon-free society

  • 100% shift of company-owned vehicles to electric vehicles (HEVs, PHEVs EVs, and FCVs) by 2025
  • 100% shift of power used at plants and laboratories in Japan to renewable energy-based power by 2023
  • Facilitating wider use of transportation means with low environmental loads, including railroads, for commuting and business trips, and encouraging remote work and meetings
  • Promoting the initiative through engagement of major suppliers (in CO2 emissions reduction)


  • Scope 1 and 2 emissions(*1): 50% reduction by 2030 versus 2019 (SBTi's(*2)official validation as a target set in line with the Paris Agreement's(*3)1.5℃ target for 2050)
  • Scope 3 Category 1 emissions(*1)(non-consolidated): 15% reduction by 2030 versus 2019 (SBTi's official validation as a target set in line with the Paris Agreement's 2℃ target for 2050)

  • Shift of company-owned vehicles to electric vehicles in Japan : 97.0%

  • Completed conversion to renewable energy at plants and the laboratory in Japan, in February 2022

  • Scope 1 and 2 : 34.9% reduction compare to the base year (22,619 t-CO2)(*4)

  • Scope 3 Category 1: 6.9% reduction compared to the base year (106,743 t-CO2)
Environmental Load Reduction (Measures for water resource and resource saving)

Conservation of limited resources, including water as the life of eye drops

  • Effectively utilizing resources through measures such as continuous reuse of water resources
  • Promoting the conversion of waste into valuables and waste recycling by continuing to completely separate waste by type
  • Ensuring the sharing and upscaling of good practices among operational bases


  • 12.4 m3/10,000 bottles of water consumption or less per unit of production
  • 98% or higher recycling rate
  • Water consumption per unit of production: 14.7 m3/10,000 bottles(*5)

  • Recycling rate: 98.5%
Environmental Load Reduction (Measures against plastic)

Reduce and shift from plastic, and become plastic-free

  • Reducing plastic consumption
  • Shifting from plastic to paper, biomass plastic and other new sustainable materials
  • Developing new sustainable materials through innovation toward solutions to technological challenges and the challenge of ensuring stable procurement


  • 60% of plastic eye drop containers being produced from biomass plastic in 2030

  • 15% reduction in plastic used for wrapping and package by 2030 versus 2019
  • Replacing to biomass plastic eye drop container: 12 eye drop products replacement had been completed

  • Investigating alternative means of plastic materials for packaging and packing material
  1. Scope 1 emissions: Direct GHG emissions from sources owned or controlled by the Company (fuel combustion and industrial processes)
    Scope 2 emissions: Indirect GHG emissions from the generation of purchased energy, such as electricity, heat, and steam
    Scope 3 Category 1 emissions: Scope 3 emissions denote indirect GHG emissions, other than Scope 1 and 2 emissions, resulting from a company's value chain activities, which are not owned or controlled by the Company. Among them, Category 1 emissions are emissions from all purchased goods and services.
  2. SBTi (Science Based Targets initiative): A joint initiative to encourage companies to set and achieve science-based targets for GHG emissions reduction in line with the Paris Agreement
  3. Paris Agreement: An agreement within the United Nations Framework Convention on Climate Change, which has set the target of holding the increase in the global average temperature to well below 2℃ above pre-industrial levels
  4. Based on figures that do not include estimated CO2 emissions derived from gasoline for overseas sales vehicles.
  5. In FY2022, water consumption increased temporarily due to the launch of a new building at the Shiga Product Supply Center. If this effect is deducted, the water usage per production quantity in FY2022 is 13.5m3/10,000 bottles.


Environmental Management System

We have established environmental conservation systems integrated with business activities at all Group companies, as well as addressing various environmental challenges, promoting environmental conservation initiatives through every single employee's autonomous activities. Noto Plant, Shiga Product Supply Center and Suzhou Plant in China have acquired ISO 14001 certification, which is the international standard for environmental management systems, and conduct environmental audits. 

Acquisition of ISO 14001 Certifications

OrganizationAreaAcquisition date

As integrated organization

  • Shiga Product Supply Center
  • Noto Plant
  • Claire Co., Ltd
Manufacture of Medicinal Chemicals
Cleaning of Aseptic and Dust-free Gownings
December 2014
Suzhou Plant(China)Production of pharmaceuticalsFebruary 2019


Environmental Audit

Each plant takes the initiative in conducting regular internal audits to check whether the environmental management system is appropriately operated, in addition to the external ISO 14001 audit. Furthermore, Santen accepts on-the-spot audits by commissioned companies of the process of commissioned production, providing good opportunities to learn about other companies' efforts, and contributing to improving our environmental measures.

Environmental Impact of Our Products

We strive to minimize the environmental impact of our products and manufacturing processes. In research and development activities, a compound to be the active ingredient for a product undergoes non-clinical studies in order to estimate its pharmacokinetics and safety following the rigorous standards mandated by GLP(*). Chemical substances used in our laboratories and plants are properly handled with assessing their toxicity and hazardousness and determining the amount released or transferred to the environment. We focus on environmental concerns from the entire product lifecycle perspective, by replacing plastic materials for eye-drop containers with biomass plastic, reducing plastic materials for packaging materials, and giving priority to the use of recycled paper for outer boxes.

  • Good Laboratory Practice, or a set of guidelines for non-clinical safety studies.

Grasping the Overview of Environmental Impact and Environmental Accounting

Santen grasps the overview of environmental impact, comprised of input such as energy usage, input of materials, and input of water resources, and output such as release into the air and water, and the release of waste and other materials. It also grasps and analyzes the costs of environmental conservation efforts (investments and costs) and their effects (economic effects and environmental conservation effects) to promote effective activities for mitigating environmental impact.

<Environmental conservation costs>(unit:million yen)
Business area costs5.4149.046.9214.2
 Pollution prevention3.764.79.372.2
 Global environmental conservation1.853.429.676.7
 Resource circulation0.030.97.965.3
Upstream/downstream costs-
Administration costs2.9131.43.2134.0
R&D costs--0.00.0
Social activity costs-
Environmental damage costs-
  • Good Laboratory Practice, or a set of guidelines for non-clinical safety studies.
  • The cost includes the depreciation amount and was accounted for the same way as the accounting.
  • Current investment includes both the investment amount and expense.
  • otal number was only a rough estimation because the totals were rounded off.
  • The employment cost of the environmental management department and operation and maintenance of the environmental management system was accounted for as administration costs.
  • “-” means no cost or no activities.
<Economic effects of environmental conservation measures>(unit:million yen)
Profits from sales of waste etc57.584.4
Cost reductions13.221.8
  • Only economic effects that can be determined with a high degree of certainty are included in the calculation.

Environmental Accidents

There was no accident that causes environmental pollution, i.e. soil contamination, and no infraction of laws or regulations related environmental issues, at our business sites in Japan or other countries in FY2022.