Chemical Substances Management

Complying with PRTR Law

Paints and organic solvents are the primary chemical substances used by Daifuku in its production facilities. The Company manages and controls the usage amounts of special chemical substances on-site as designated under the PRTR Law.*


  • *PRTR (Pollutant Release and Transfer Register) Law: A law that requires enterprises to submit a report to their national governing authority specifying the number and volume of chemical substances they are releasing into the environment. This is aimed at voluntary management of chemical substances and the prevention of environmental pollution.

Emission and transfer volume of chemical substances related to PRTR Law

Shiga Works

Emission and transfer volume of chemical substances related to PRTR Law
  FY2013 FY2014 FY2015 FY2016 FY2017 FY2018
Emission and transfer (kg) 23,506 18,691 30,010 18,969 27,223 23,765
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Amount of PRTR-related chemical substances handled in FY2018

Shiga Works


Amount of PRTR-related chemical substances handled in FY2018
Control No. Chemicals Transaction Volume Emission to Transfer to
Air Public water Soil Land Total emissions Sewage Misc Total transfer
37 Bisphenol A 1,575.30000000551.36551.36
53 Ethylbenzene 5,023.485,023.480005,023.48000
80 Xylene 6,722.176,722.170006,722.17000
296 1,2,4-Trimethylbenzene 543.49 543.49 000543.49 000
297 1,3,5-Trimethylbenzene 170.16170.16000170.16000
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(Note) Chemical substances of which less than 100 kg is handled are omitted as the amounts are negligible.

Preventing Water Pollution

The Shiga Works, which accounts for approximately 80% of Daifuku’s water consumption in Japan, maintains a 24-hour continuous monitoring system with three wastewater treatment facilities that ensure water quality on par with agricultural water by thoroughly complying with drainage standards established by the Shiga Prefecture Ordinance and Pollution Control Agreement with Hino Town. In addition, we invite neighboring residents and provide opportunities to visit our wastewater treatment facilities and see our thorough water quality management systems, which facilitates good relationships with stakeholders.

Water quality Management

Water quality survey

We recognize that water pollution is an important issue that broadly affects soil, agricultural produce, living environments, and more. We not only comply with laws and regulations, but also make meticulous efforts to manage and reduce waste water.

Result of final effluent quality measurements in FY2018

Shiga Works (in accordance with the Water Pollution Prevention Act, prefectural ordinances, and the Hino Town pollution control agreement)

Result of final effluent quality measurements in FY2018
Measurement item Regulation value Results
Max Min Avg
Amount of drainage (m3/day) - 498.9 59.4 367.1
pH 6.0 to 8.5 7.7 6.7 7.3
SS (mg/ℓ) 20 or less 4.8 0.5 1.0
COD (mg/ℓ) 20 or less 2.5 0.2 0.7
BOD (mg/ℓ) 20 or less 2.0 1.0 1.3
Total phosphorus (mg/ℓ) 1 or less 0.1 0.1 0.1
Total nitrogen (mg/ℓ) 10 or less 4.1 0.5 1.3

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(Note) The average value is the weighted average.

  • Effluent treatment facilities

    Effluent treatment facilities

  • Effluent before (left) and after (right) treatment

    Effluent before (left) and after (right) treatment

Recycling sludge into cement materials

At the Shiga Works' wastewater treatment facility, it is necessary to treat the sludge produced to maintain stable water treatment. The dewatered sludge withdrawn from the facility is treated using a dryer and is turned into dried sludge with 20% water content. This has led to a large reduction in excess sludge as well as a reduction in waste treatment cost. Furthermore, dried sludge is put to good use as a raw material for cement.

  • Sludge recycling facility

    Sludge recycling facility

  • Dried sludge

    Dried sludge

Air Pollution Prevention

Based on Ordinance 25, Clause 1 of the Ordinance Concerning the Reduction of Impact on the Air Environment of Shiga Prefecture, the Shiga Works is designated as a "place of business subject to a plan to reduce its environmental impact on the air." We are striving to control and reduce smoke-related air pollutants.

Result of final air pollutant measurements in FY2018

Shiga Works (according to the Hino Town environmental pollution control agreement)

Air pollutant volume in FY2018
Material Facility Regulation value Results
Max Min Avg
Dust (g/m3N) Dynamos 0.1 0.013 0.005 0.008
Sulfur oxide (SOx) (m3N/h) Dynamos 2.3 0.100 0.060 0.078
Nitrogen oxide (NOx) (ppm) Dynamos 950 820 710 772

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Green Procurement

Implementation of Green Procurement Guidelines

As a global enterprise, we believe that our mission is to make environmentally friendly products. Under the motto, "We will not buy, use, or sell any hazardous materials," we formulated our Green Procurement Guidelines in 2005. Following the guidelines, we prioritize the purchase of materials and products that are resource saving, energy saving and reusable.

Compliance with European harmful substance regulations

The entire Daifuku Group focuses on the European REACH regulations.*, and goes to great lengths to visualize and remove any harmful chemicals in its products. The Company continues to offer environmentally friendly products through implementation of Green Procurement Guidelines by looking at its entire supply chain.

  • *REACH (Registration, Evaluation, Authorization, and Restriction of Chemicals) Regulations: Companies must register and evaluate the safety of chemical substances contained in the products they manufacture and sell in Europe.

Local production for local consumption at canteens

Since August 2014, a menu using local ingredients is provided every week at the three canteens in the Shiga Works. Plenty of variety is provided, such as the renowned locally produced Hinona turnips and highly nutritious and richly flavored eggs from Eigen-ji. This initiative will continue on as an activity in reducing food mileage, to reduce the amount of CO2 emissions that comes from transport.

  • Local production for local consumption at canteens
  • Local production for local consumption at canteens