Environmental Management

Why SUMCO Addresses Environmental Issues

From energy-saving initiatives to curbing greenhouse gas emissions and reducing waste, lowering the environmental load by the business activities of companies is a pressing task to ensure that the global environment is maintained and protected.
To ensure that the irreplaceable global environment is passed on to future generations, the SUMCO Group has established an environmental management system. We have obtained ISO14001 certification for all of our plants, and pursue initiatives aimed at protecting the environment.

SUMCO Environmental Policies

1. Basic Environmental Philosophy

As a manufacturer of high-quality silicon wafers for semiconductors and of quartz crucibles, SUMCO has established the following action guidelines and is committed to self-initiated and sustained environmental conservation activities to pass on the Earth's irreplaceable environment to future generations.

2. Environmental Action Guidelines

  1. Through our business activities, we shall pursue activities with an emphasis on the following points.
    1. (1) We shall act to conserve electricity and other energies consumed by our business activities, thereby curbing emissions of greenhouse gases.
    2. (2) We shall strive to reduce waste and increase recycling and reuse rates.
    3. (3) We shall strive to reduce and recycle water used in our business activities.
    4. (4) We shall strive to reduce chemical substances used in our business activities.
    5. (5) We shall thoroughly manage the harmful chemical substances and waste, thereby reducing the risks to the environment.
  2. We shall abide by environment-related laws and regulations, bylaws, and other agreed requirements.
  3. We shall strive to prevent environmental pollution in our entire business activities and undertake efforts to protect the global environment and coexist in harmony with local communities.
  4. We shall promote green procurement with our suppliers, thereby reducing environmental load.
  5. We shall define environmental objectives, and by periodically reviewing these objectives, shall promote continuous improvement of our environmental management system.
  6. We shall endeavor to consider and conserve biodiversity.

May 1, 2021

Environmental Management Structure

The SUMCO Group has established the Environmental Management Structure in which the Environmental Management Officer, a member of the Management Conference, appoints the Company-wide Environmental Manager and the Environmental Managers at site, and defines their roles, responsibilities and authorities. Thoroughness of instructions and information sharing are ensured at meetings of the Company-wide Environmental Management Committee and the Environmental Management Committee at each site, both of which are convened periodically. SUMCO's Environmental Management Officer holds chief responsibility for issues related to climate change and has chief authority regarding those issues. The Environmental Management Officer convenes meetings of the Environmental Management Committee and monitors SUMCO's efforts to address climate change.

Environmental Management Structure

Environmental Management Structure

Tackling climate change (Goals for Carbon Neutral)

Tackling climate change is one of the goals in SDGs, and delinking of economic growth and environmental degradation is strongly required.
The SUMCO Group, which supports the growing semiconductor industry, set new goals for carbon neutral covering Scope 1+2 in September 2021 toward the realization of a sustainable society.

Target Year 2030 (Mid-term Goal) 2050 (Long-term Goal)
Goals 33% reduction from 2014
(2.5% reduction per year)
[in conformity to 2℃ scenario of SBT (※1)]
100% reduction (Carbon Neutral)
[in conformity to the declaration aiming carbon neutral by 2050 by the Government of Japan]
Initiatives Continuous energy-conservation activities
Further introduction of more renewable energy (such as Solar power generation, etc.)
Procurement of non-fossil electricity (such as J-Credit and Non-Fossil Certificates), etc.
  • (※1)Science Based Targets
  •  Reduction targets of greenhouse gas emissions set by companies that comply with the standards of the Paris Agreement.

Unit energy usage goal

In addition to the goals targeting carbon neutral, we set an unit energy usage goal in 2019.The CO2 emissions related to the unit consumption calculation are the actual emissions of Scope1+2 (no carbon offset) and we shall strive to reduce CO2 emissions by reducing energy consumption and improving energy efficiency in our corporate activities.

Target Year 2030
Goal 14.9% reduction from 2014 (1.0% reduction per year)
(CO2 emission in 2014 : 821,000 tons-CO2
Initiatives Continuous energy-conservation activities

Environmental Objectives

The SUMCO Group sets environmental objectives for each of its operating bases based on its Environmental Policies and the results of environmental load assessments that are conducted periodically. We implement initiatives at each site to reduce environmental load in accordance with these objectives, such as reducing CO2 emissions, chemical substances used, industrial waste generated, and water used. The accomplishments are reported and reviewed semiannually in the Environmental Management Committee and the targets are revised as needed. The standard values are based on the results of the previous year.

2021-2024 Environmental Objectives and 2021 Results

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BM*1 2021 2022 2023 2024
Objectives Results Objectives Objectives Objectives
Reduction of CO2 emissions
Previous year's results 1.0% 1.2% 0.4% 0.4% 0.4%
Reduction of chemical substance use 0.8% 1.0% 0.7% 0.7% 0.7%
Reduction of industrial waste
(reduction of hazardous waste*2 released)
Reduction of water consumption 0.6% 0.7% 0.5% 0.5% 0.5%
  • *1BM = Bench Mark
  • - In the fiscal year 2021, our performance exceeded the objective figures in all items. Especially, we achieved major reductions in the amounts of industrial wastes by installing waste liquid concentrators.
  • - Evaluating performance for each six-month period, we set target figures for subsequent fiscal years based on a careful examination of items applicable across each operating site.We set objective figures for 2022 which is less than that of 2021 due to the start-up of new manufacturing equipment, etc.
  • *2Hazardous waste refers to specially controlled industrial waste as defined in Japan’s Waste Management and Public Cleansing Act.
Reduction Objectives for Each Base of Operations (9 Manufacturing Bases in Japan)

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Site BM 2021
Reduction of CO2 emissions Reduction of chemical substance use Reduction of industrial waste Reduction of water consumption
Objectives Results Objectives Results Objectives Results Objectives Results
Kyushu Factory (Nagahama, Imari) Previous year's results 2.0% 2.5% 0.6% 1.3% 0.3% 0.6% 0.2% 0.3%
Kyushu Factory (Kubara, Imari) 0.4% 0.4% 1.2% 1.4% 0.3% 0.4% 0.01% 0.02%
Kyushu Factory (Saga) 3.6% 3.8% 0.4% 0.4% 0.2% 0.3% 0.3% 0.3%
Yonezawa Plant 0.9% 1.0% 4.7% 2.7% 3.3% 2.3% 0.1% 0.1%
Chitose Plant 0.4% 0.6% 0.03% 0.1% 1.0% 2.4% 0.2% 0.2%
JSQ Division 2.1% 2.8% 0.7% 0.7% 0.5% 2.9% 2.7% 3.4%
SUMCO Technology Corp. Noda Plant 1.7% 1.8% 0.8% 0.8% 0.0% 0.0% 1.4% 0.7%
SUMCO TECHXIV Corp. Nagasaki Plant 0.2% 0.2% 0.2% 0.2% 6.9% 10.3% 2.2% 2.4%
SUMCO TECHXIV Corp. Miyazaki Plant 0.5% 0.5% 0.3% 1.0% 0.3% 1.3% 0.4% 0.4%
Total 1.0% 1.2% 0.8% 1.0% 1.5% 2.2% 0.6% 0.7%
  • As our efforts for reduction in CO2 emissions, we have promoted reducing electricity usage by integrating and upgrading coolers, among other initiatives.
  • As our efforts for reduction in use of chemical substances, we have promoted recycling exhaust gas treatment water, and reducing the amount of chemicals introduced in reaction tanks, among other initiatives.
  • As our efforts for reduction in industrial waste discharge, we have promoted reducing sludge by installing waste liquid concentrators, among other initiatives.
  • As our efforts for reduction in industrial water usage, we have promoted improving recycle ratio of pure water used in our manufacturing process, and upgrading aging cooling towers sequentially, among other initiatives.

Environmental Risk Management

The SUMCO Group identifies environmental risks in the Basic Rules on Risk Management, including risk related to climate. Identified risks are incorporated into an initiative plan for environmental risks such as environmental pollution and extreme weather due to global warmings under the BSC and environmental management system. Then, the achievements are reported to the Environmental Management Officer as well as BSC and reviewed by top management.

Environmental Education

Education and Training Targeted at Suppliers to Increase Understanding of the Environmental Policies and Prevent Environmental Accidents

The SUMCO Group provides environmental education to supplier of chemicals and other products and to industrial waste treatment firms covering SUMCO's Environmental Policies, prevention of environmental accidents and compliance with laws and ordinances.
In 2021, we conducted online group training and document distribution training to prevent infection due to the COVID-19 pandemic. As for the results of the training, we receive training records from each company to confirm the level of understanding.

Contents of Education

  1. Requests for vehicle inspections to prevent fuel, oil and other substances from leaking
  2. The importance of SUMCO personnel being present at the time of delivery or collection, and request that their instructions be followed
  3. Request for inspection of industrial waste collection vehicles, particularly to prevent leakage or dripping of sludge, liquid waste, etc.
  4. Introduction to actual environmental accidents that occurred at the Company in the past

Environmental Accounting

In accordance with Ministry of the Environment's Environmental Accounting Guidelines 2005, the SUMCO Group calculates the results of our group (Japan) from January 2021 to December 2021.

Environmental Costs

(million yen per year)
Investments 1,200
Expenses*1 3,200
  • *1Internal labor cost, depreciation expenses and energy costs (electric power, fuel, water, etc.) related to operation are not included.

Environmental Conservation Benefits, Economic Effect

Category (Unit) Environmental Conservation Benefits
Economic Effect
(million yen per year)*3
Electricity consumption (GWh) (80) 179
Fuel consumption (crude oil equivalent kL) (310)
Water consumption (Mm3) (1.3)
Chemical substance consumption (t) 16
Industrial waste emissions (t) 3,300
  • *2The negative value indicates that the increase in environmental impacts exceeded reductions due to increases of production volume and trial productions that does not contribute to sales.
  • *3Calculated by our original estimating method.

Environmental Audits

Through the SUMCO Group, internal environmental audits are conducted by internal auditors, while environmental management system audits are implemented by an outside review organization.

Internal Environmental Audit

Internal environmental audits are annually conducted by internal auditors for all organizations in the SUMCO Group subject to the Company's environmental management system. The results are reported to the Environmental Management Officer and reflected in the following year's activities to enable continuous improvement of the environmental management system.

Environmental Management System Audit

The SUMCO Group is subject to regular audits conducted every year and a renewal audit conducted every three years by an external independent auditor. Any nonconformity was not found in the audit conducted in 2021.

Compliance with Environmental Legislation

The SUMCO Group identifies the requirements of laws, regulations and agreements and verifies compliance. None of the items which is incompliance with laws and regulations were found in 2021.
We also ensure compliance with overseas chemical substance regulations, namely the Restriction on Hazardous Substances (RoHS) Directive and Regulation on Registration, Evaluation, Authorization and Restriction of Chemical Substances (REACH).

State of Compliance with Environmental Laws and Regulations

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5 years prior
4 years prior
3 years prior
2 years prior
Last year
Violations 0 0 0 0 0
Fines (yen) 0 0 0 0 0

Progress of Soil and Groundwater Contamination Countermeasures

Accumulated Amount of Contaminated Substances Recovered Annually from Groundwater at the Noda Plant

The SUMCO Group conducts soil and groundwater contamination surveys at all facility sites.
In a voluntary survey implemented at the Noda site in 2005, it was found that amounts of volatile organic compounds (VOC) and fluorine exceeded the soil and groundwater environmental standard values. We have been pursuing countermeasures in consultation with relevant parties. At present, we are working to prevent the spread of and recover contaminated substances by using a pumping well set up near the boundary of the plant grounds.

In fiscal year 2021, there were no new incidents related to industrial water/wastewater across the SUMCO Group.

ISO 14001 Management System Certificate