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【全・英】メガメニュー
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Realization of an Environmentally Conscious Society

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Through its business activities, the Group is working to reduce GHG (greenhouse gas) emissions, which is an important issue of global scale. In response to market and customer demands for environmental friendliness, we will integrate the design, procurement, and manufacturing processes for our products and services to provide added value, such as energy savings. In addition, to reduce GHG emissions in Scope 1 and 2, we will pursue efficient energy use by harnessing the creativity and ingenuity of all our employees.

|Environmental policies

  1. We will evaluate the environmental impact of all our business activities and the products we provide to our customers at during production, use, and disposal, and strive to save resources and energy, reduce waste, and prevent pollution.
  2. We will establish and maintain a PDCA cycle by setting environmental objectives and targets for these initiatives.
  3. In addition to complying with environmental laws and regulations, ordinances, industry codes of conduct, and agreements with local communities, we will establish and maintain independent management standards wherever possible.
  4. We will establish an environmental management system in which all employees participate, using audits and reviews to make improvements on an ongoing basis.
  5. We will provide education to all employees to improve their awareness of the environment and the environmental management system, as well as asking our affiliates and partner companies for their understanding and cooperation.
  6. These environmental policies shall be publicly disclosed.

Environmental policies in each district

Our Nasu, Yaita, and Sano plants have drawn up their own environmental policies based on the company- wide policies, taking into account the characteristics of the manufacturing they perform and consideration for the surrounding environment. In order to put our basic philosophy into practice, each district has formulated its own environmental policies and is working actively to acquire various certifications, including ISO 14001.

ISO 14001 compliance status
Location Nasu Plant Yaita Plant Sano Plant Tanuma Plant
Date acquired December 2005 January 2007 April 2007 November 2006

|Environmental management structure

The Environment Committee is in charge of company-wide environmental policy, and the Environmental Management Subcommittee has been established beneath it. The head of the Human Resources & General Affairs Department chairs both committees, and the managers of the Nasu, Yaita, and Sano plants serve as committee members.


|Climate Change Initiatives

The TOKYO KEIKI Group is working to reduce GHG emissions and promote resource and energy conservation to minimize the impact of our business on climate change. At the same time, we are taking steps to mitigate the impact of future climate change on the Group’s businesses.

Initiatives on TCFD recommendations

We announced our endorsement of the Task Force on Climate-related Financial Disclosures (TCFD) recommendations in August 2022. By using the TCFD framework to comprehensively assess risks and opportunities related to climate change, we will enhance the resilience of our strategies. In addition, we will set clear indicators and targets for each initiative and enhance our disclosure of events that have a material impact on our business activities, providing climate change-related financial information and more.

(1) Governance

To promote sustainability management, our Group established the Sustainability Promotion Office and the Sustainability Committee in June 2021. At the center of our Group, the Sustainability Promotion Office plans and promotes measures involving sustainability management. The Sustainability Committee is chaired by the Representative Director, President & CEO and selects members from Internal Directors and Executive Officers. It functions as a meeting body that discusses and shares sustainability management-related policies and measures, and executes decisions without delay across the Group. It also makes proposals on key measures and issues progress reports to the Management Conference and the Board of Directors.
  The Sustainability Committee met nine times in fiscal 2022, planning and formulating important measures such as the determination of our sustainability policy and identification of materialities. The proposals were then sent to the Management Conference and Board of Directors for their deliberation before being adopted by the Group.


(2) Strategy
(2)-1. Scenario analysis based on TCFD recommendations

The TOKYO KEIKI Group recognizes climate change as a critical issue in the sustainability management of the Group. For that reason, we created our own scenarios based on the TCFD recommendations and referring to the 2°C and 4°C warming scenarios in the IPCC’s Sixth Assessment Report. Using these scenarios, we evaluated the impact of a warmer climate in 2030, the target year for achieving our mid- to long-term strategy. The table below lays out our view of each scenario.


Scenario analysis based on TCFD recommendations


(2)-2. Assessment of risks and opportunities based on scenario analysis

Based on the scenarios we created, we identified events that could affect TOKYO KEIKI Group business activities and measures to deal with them. We are presently reviewing specific initiatives and plan to decide on them as part of our materiality initiatives in conjunction with the next medium-term business plan. We will announce these when they are decided. The table below shows the events that we identified and countermeasures that are conceivable at this time.


Assessment of risks and opportunities based on scenario analysis


(3) Risk management

The TOKYO KEIKI Group manages risks in keeping with our risk management system.* Following our Risk Management Rules, we classify risks as major management risks or other risks and manage them accordingly. Risks that relate to sustainability are written up for the Sustainability Committee’s consideration by members of the Sustainability Promotion Office or Sustainability Committee. The Sustainability Committee promptly discusses the magnitude of the risks and how to deal with them. Its resolutions go to the Management Conference and Board of Directors for deliberation and final approval.

(4) Indicators and targets

・ Scope 1 and 2 GHG emissions reductions

The Group set a target of reducing GHG emissions within the Group by 37% in fiscal 2030 compared to fiscal 2013. We are conducting activities to achieve this. In fiscal 2022, in addition to planned capital investments for energy conservation that we were already making, we switched part of our electricity purchases to green power midway through the fiscal year. These efforts caused fiscal 2022 emissions to decline to 9,077 t-CO2, a reduction of 9.4% from the previous fiscal year.
  In September 2023, our Vietnamese subsidiary TOKYO KEIKI PRECISION TECHNOLOGY CO., LTD. (TPT) also began a PPA (power purchase agreement for solar power). This will further accelerate GHG emissions reductions. The trends in Scope 1 and 2 emissions reductions are shown in the figure on the right.

Trends in GHG emissions reductions (Scope 1 and 2)


Initiatives to use renewable energy

TPT entered into a PPA in March 2022. Construction was subsequently delayed due to circumstances in Vietnam, but the supply of electricity began in September 2023. Thanks to this arrangement, solar power can provide about 30% of the electricity used by TPT, which could reduce GHG emissions by an estimated 400 t-CO2 yearly.
  TOKYO KEIKI has also decided to install solar power generation equipment at our Nasu Plant as part of our own facilities. Although the amount of power generated is small, we determined that the Nasu Plant could use the generated electricity without waste since it has a clean room that operates year-round. Our aim is to begin operation of the solar power equipment in fiscal 2023.

Solar panels on factory roof (TPT)

Energy saving initiatives at Headquarters building

Subsidiary TOKYO KEIKI TECHNOPORT INC. (TCN), which manages the TOKYO KEIKI headquarters building, sets annual targets for reducing energy consumption and manages progress on those targets. Buildings constructed in recent years commonly have individual air-conditioning systems to save energy. By contrast, the headquarters building, completed in 1988, has an atrium at its center, which makes energy conservation difficult.
  To meet the challenge, TCN developed and implemented detailed daily plans for energy conservation. In fiscal 2022, despite many extremely hot days that summer, energy consumption fell 6.4% compared to fiscal 2020. In addition, consumption of city gas, which is also used for heating in winter, decreased by a very significant 25.8%. And with energy prices so high, it is even more important to reduce consumption. Our intent is to increase the number of energy-saving actions that individual Headquarters workers can take.

Initiatives for Environmental Management

In the manufacturing industry, it is our social responsibility to try to minimize our impact on the environment when we choose materials and use energy to make our products. By fulfilling this responsibility while engaging in business activities, we will contribute to the realization of a sustainable society.

|Initiatives to reduce waste

The TOKYO KEIKI Group aims to reduce the environmental impact of various types of waste generated when manufacturing our products. Our Group-wide efforts to reduce such waste are based on the 3Rs concept.

Compliance with laws and regulations

Waste is disposed of appropriately in accordance with laws and government ordinances, as well as the regulations of the municipalities where our factories and plants are located.


Amount of industrial waste produced



Promoting the “3Rs”

・Reuse
We are now reusing some of our used products and parts (including electronic parts) with the approval of our customers.


・Reduce
The use of equipment to reclaim wash oil and the evaporation and drying of wastewater from glass processing are helping to reduce the amount of wastewater and waste oil we produce. In fiscal 2022, the Sano Plant produced less waste oil, but other types of waste remained at about the fiscal 2021 level, for a total of 259 tons of waste.


・Recycle
We hire contractors to take our scrap metal, waste oil, and waste paper, which are valuable recyclable materials, and accordingly thoroughly separate our waste. The breakdown for these valuable recyclable materials for fiscal 2022 was 403t of scrap metal, 17t of waste oil, and 51t of waste paper.

Valuable recyclable materials produced



Recycling used wash oil

The Sano Plant alone accounts for about two-thirds of the company’s overall waste output, and roughly 60% of that is water-soluble cutting fluid, wash oil, and other types of waste oil. To reduce the amount of these wastes, we installed hydrocarbon-based wash oil recycling equipment in fiscal 2020. The equipment separates out about 10% of the oil dissolved in the wash oil. The remaining 90% of the wash oil can be used as new, which reduces waste and uses resources more effectively.
  In fiscal 2022, the equipment recycled 6,881 liters of oil. Going forward, we will continue to recycle waste oil to reduce our waste output.


Amount of waste oil reduced through use of wash oil recycling equipment (FY2022)

|Measures for proper management of chemicals

Some chemical substances have harmful effects on the environment and human body. As such, it is companies’ social responsibility to manage them properly and to take the environment and occupational safety into account. We are working to cut our emissions of chemicals by setting voluntary reduction targets.

Switching to alternatives to hazardous chemicals

Each of our factories is actively switching to alternative materials to hazardous chemicals.

  • Cleaning agents for hydraulic products
    Switched from dichloromethane to hydrocarbon-based
  • Thinners
    Switched to alternatives free from toluene and xylene
  • Cutting fluid
    Switched to alternatives free from chlorine

In the past, we used dichloromethane to remove oil from the surface of hydraulic products produced at the Sano Plant prior to the coating process. Dichloromethane, however, is a highly toxic chemical substance. We made the decision to switch to a less toxic hydrocarbon-based cleaning agent and designed and built our own dedicated cleaning equipment. The equipment started operating in January 2021. The amount of dichloromethane used was 495 kg in fiscal 2021 and 743 kg in fiscal 2022. These represent a significant reduction in use of over 90% compared to fiscal 2020, and a reduction in environmental and human health impact.

Response to the PRTR system

Pollutant Release and Transfer Register (PRTR) is a system to determine the amount of hazardous Class 1-designated chemical substances discharged from factories and report the results to the national government. The government then compiles and publishes the data.
  Reducing dichloromethane emissions at the Sano Plant has been a challenge for a long time. However, we have significantly reduced emissions by switching to a hydrocarbon-based cleaning agent and recycling it. Since fiscal 2021, we have no longer needed to submit reports to the government. Likewise, we have not needed to report on toluene emissions since 2020. However, we will continue to monitor emissions of both substances.

PRTR emissions: Sano Plant *Emissions only (excluding transfers)
FY Dichloromethane (kg) Toluene (kg)
2018 18,400 1,330
2019 14,000 1,100
2020 11,000 986
2021 495 989
2022 743 927
PRTR emissions: Nasu Plant *Emissions only (excluding transfers)
FY Xylene (kg) 1,2,4-Trimethylbenzene (kg)
2018 66 17
2019 51 12
2020 50 12
2021 49 13
2022 13 11

|Initiatives to protect biodiversity

Another critical social responsibility for our Headquarters, plants, business locations, and other sites as we continue our business is to reduce the impact on the surrounding environment and work to conserve it. The Group is committed to protecting the environment site by site.

Green space around the Headquarters building certified as an Ota Ward Protected Forest

Technoport Kamata, the location of TOKYO KEIKI’s Headquarters, is an office building block that was built as a redevelopment of the site of our former headquarters and plant. Two-thirds of the vast grounds were turned into a tranquil green space environment, becoming a conspicuous green oasis in Kamata, a district with little verdure. The area around our Headquarters, in particular, is surrounded by a variety of trees, and Ota Ward has designated the more than 2,000-m2 green space around the Headquarters building as a “Protected Forest.”

Ota Ward Protected Forest

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承認:エディタ