Environmental Activities

Basic Approach

We are working to preserve and exist in harmony with the environment to create a prosperous society.

Our basic approach to the environment is to continuously improve all aspects of our business activities in consideration of the global environment. We have established a management system to promote environmental management and continue our efforts to reduce greenhouse gas (CO2) emissions and other environmental impacts.
We will continue to make concerted efforts to make effective use of limited resources, focusing on the strategies below.

●We will strive to prevent global warming, conserve biodiversity, and protect the environment in order to realize a sustainable society.

●We will promote corporate activities that emphasize the environment, such as the adoption of high-efficiency equipment and energy conversion.

●We will strive to control chemical substances, conserve energy and resources, reduce waste, and prevent environmental pollution that affects air and water quality.

●We will strive to produce and sell environmentally friendly products.

Our Safety and Environment Slogan

"If everyone is careful, we can avoid danger before it happens.
We will protect safety and the environment by being conscious of it every day."
"We will pass down a livable environment to future generations."

Key Initiatives

●Reduce greenhouse gas (CO2) emissions (click here for details)

⇒Reduce CO2 emissions through the production and sale of reclaimed wafers (click here for details)
(Click here to learn more about reclaimed wafers.)

⇒Reduce CO2 emissions by reducing energy consumption

Use modal shift (click here for details)
Adopt high-efficiency equipment
Switch energy source from kerosene to natural gas
Utilize exhaust heat
Change company-owned vehicles to HVs and EVs
Use LEDs for lighting equipment

etc.

●Reduce waste (waste reductions also contribute to reduced CO2 emissions)

⇒Zero emissions*

* Reduce the amount of final disposal (landfill disposal) of waste from production activities to zero.

Recycle sludge (click here for details)
Reuse waste alkaline solution (click here for details)
Recycle plastic (click here for details)

etc.

●Prevent environmental pollution

⇒Wastewater quality control (click here for details)

●Other initiatives

⇒Green procurement (purchasing materials compliant with RoHS Directive and REACH regulations)

Results of initiatives (the period of each graph is from April 1 of the year indicated to March 31 of the following year)

● See the graph below for greenhouse gas (CO2) emissions and other data.

Changes in Greenhouse Gas (CO2) Emissions per Unit of Production

CO2 Emissions and Reductions

The graphs below are comparisons by fiscal year of our CO2 emissions with the total CO2 emissions reductions from the production and sale of reclaimed wafers and from environmental activities (1) through (4) below. The CO2 reduction effect of reclaimed wafers is significant and surpasses our CO2 emissions.

●Please refer to the following for the CO2 reductions and environmental measurement results from our key initiatives.

Total CO2 reduction through waste reduction and modal shift
（Total amount of CO2 reduction through activities (1) to (4) below）

①Recycling of sludge

By recycling sludge discharged from factories into improved soil that can be used for the construction of roads and other infrastructure, CO2 emissions from high-temperature treatment of sludge as industrial waste can be reduced.

②Reuse of waste alkaline solution

Waste alkaline solution discharged from factories is reused as a neutralizer at industrial waste disposal companies, thereby reducing the amount of new neutralizers used and contributing to the reduction of CO2 emitted during the production of new neutralizers.

③Recycling of plastic

By recycling plastic waste such as plastic bags and packaging materials, we can reduce the amount of CO2 emitted from the incineration of plastic as industrial waste.

④Use of modal shift

Modal shift refers to the switch from using aircraft and trucks for cargo transportation to using ships and railroads, which have a smaller environmental impact. We contribute to the reduction of CO2 emissions by changing our transportation method for recycled wafers from aircraft and trucks to ships and freight trains.

State of Wastewater Quality Measurement

Measurement Criteria	Units	Prefectural ordinance standards	Pollution control agreement standards	Our measurement results
				Maximum	Minimum	Average
pH	ー	5.8〜8.6	5.8〜8.6	7.4	6.8	7.2
Final BOD	mg/ℓ	25 or less	10 or less	1.1	Less than 1	Less than 1
COD(Mn)	mg/ℓ	25 or less	ー	2.0	Less than 1	1.6
SS	mg/ℓ	50 or less	10 or less	Less than 2	Less than 2	Less than 2
n-Hexane	mg/ℓ	5 or less	3 or less	Less than 1	Less than 1	Less than 1
Fluorine	mg/ℓ	8 or less	8 or less	Less than 0.5	Less than 0.5	Less than 0.5
Total nitrogen	mg/ℓ	120 or less	ー	30	9.5	21
Total phosphorus	mg/ℓ	16 or less	ー	Less than 0.1	Less than 0.1	Less than 0.1
Ammonia, nitrous acid	mg/ℓ	100 or less	ー	7.8
Boric acid	mg/ℓ	10 or less	ー	0.03

* Measurement results are from the 55th period (June 2023 to May 2024).

We regularly measure water quality control criteria and manage water quality to meet the standards established by basic environmental ordinances and pollution control agreements. Our measurement results are well below the standard values.

* Prefectural ordinance values are the values from the Gunma Prefecture Basic Environmental Ordinance.

* Pollution prevention agreement values are values from the Takasaki City Pollution Prevention Agreement.

Environmental Data

We have complied data on our energy consumption, CO2 emissions, waste, water resources, and other environmental data for the past five years. Click here to view our environmental data (PDF).