Management of Chemicals (Japan)

In 1994, we established a system for preliminary examination of new chemical substances to inhibit use of harmful chemical substances. We’ve managed this aspect since then. This system prevents the purchase of chemicals not certified by the Environmental Management Subcommittee and suppresses the use of harmful substances. It also compiles a database of chemicals and makes it easier to identify consumption and types for an entire company or specific department.

Managing PCB

  • The Koki Holdings Group properly stores, manages, disposes of, and reports PCBs under the PCBs Special Measures Law and the Electricity Business Act.
    In May 2020, we disposed of PCB waste (fluorescent ballast) stored at Shirako Logistics Center through consignment to Japan Environmental Storage & Safety Corporation (JESCO).
    Regarding the remaining PCB containing equipment (transformers) still used at the headquarters of Sankyo Diamond Industrial Co., Ltd., we plan to implement an upgrade that will affect business operations. We will complete disposal in fiscal year 2021, five years before the statutory limit for disposal.

    PCB waste stored at Shirako Logistics Center

    PCB waste stored at Shirako Logistics Center

Managing PRTR Chemicals

  • The Koki Holdings Group is committed to managing and reducing chemical substances under the Act on Confirmation, etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion of Improvements to the Management Thereof (PRTR act). We use the SDS (Safety Data Sheets) of purchased chemical substances and the chemicals management system to identify purchase and discharge volumes and to promote green procurement and the use of alternative materials to achieve reductions. We’re also promoting voluntary management under the PRTR act and properly manage, identify, and report discharge and transfer volumes.
    In fiscal year 2019, the Koki Holdings Group used 16 of 462 chemical substance categories (of which trading volumes are 10 kg/year or more as of March 2020).

    Graph of Trading, discharge, and transfer volumes of PRTR chemicals

Trading, Discharge, and Transfer Volumes of PRTR Chemicals (of which Trading Volume are 10 kg or More): FY2019 Results

(kg/year)

PRTR
Substance No.
Specified chemical substance name Trading Discharge Transfer Transfer
Discharge
Adhering to products Other
Air Water Soil On-site landfill Waste Sewerage system
53 Ethylbenzene 609 279 0 0 0 156 0 435 174 0
57 Ethylene glycol
Monoethyl ether
280 8 0 0 0 266 0 274 6 0
80 Xylene 2,805 1,927 0 0 0 238 0 2,165 640 0
82 Silver and its water-soluble compounds 392 0 0 0 0 0 0 0 392 0
132 Cobalt and its compounds 1,737 0 0 0 0 0 0 0 1,737 0
133 Acetic acid, 2-ethoxyethyl ester 40 16 0 0 0 12 0 28 12 0
186 Dichloromethane 162 65 0 0 0 48 0 113 48 0
188 N,N-dicyclohexyl
Amine
59 47 0 0 0 0 0 47 12 0
297 1,3,5-trimethylbenzene 40 16 0 0 0 12 0 28 12 0
300 Toluene 1,640 1,051 0 0 0 199 0 1,250 390 0
302 Naphthalene 10 0 0 0 0 10 0 10 0 0
308 Nickel 4,521 0 0 0 0 0 0 0 4,521 0
309 Nickel compounds 255 0 0 0 0 77 0 77 179 0
374 Hydrogen fluoride
and its water-soluble salts
76 0 0 0 0 23 0 23 53 0
411 Formaldehyde 12 5 0 0 0 3 0 8 3 0
438 Methylnaphthalene 4,475 22 0 0 0 0 0 22 0 4,452
Total 17,114 3,436 0 0 0 1,045 0 4,481 8,181 4,452

Reduction of VOC Emissions into the atmosphere

The Koki Holdings Group is committed to global environmental conservation through the system for preliminary examination of newly used chemical substances and the management of chemical substances, emissions, and effluent. Most emissions are volatile organic compounds (VOC) found in paints and solvents. We reduced the ratio of VOC emissions into the atmosphere to 65% by using electrodeposition coating or paints containing less VOC and by improving painting efficiency. We will continue to reduce the ratio of emissions into the atmosphere and total emissions.

VOC Trading Volume and Emissions: FY2019 Results

(kg/year)

Substance name Trading Discharge Emissions ratio (%)
(emissions/trading)
Japan Outside Japan Total Japan Outside Japan Total
Isopropyl alcohol 209 0 209 167 0 167 80
Toluene 1,684 1,315 2,999 1,086 1,052 2,138 71
Butyl acetate 1,721 20,506 22,227 1,377 16,405 17,781 80
Methanol 22,590 10,097 32,688 361 8,078 8,439 26
Xylene 2,550 34,773 37,323 1,828 27,818 29,646 79
Methyl ethyl ketone 811 0 811 649 0 649 80
Ethanol 28 1,650 1,678 28 1,320 1,348 80
n-butanol 673 10,253 10,926 538 8,202 8,741 80
Methyl isobutyl ketone 614 0 614 491 0 491 80
Other 1,005 9,492 10,497 856 7,594 8,450 80
Total 31,884 88,087 119,971 7,380 70,469 77,849 65