Outside Organizations

External Evaluation

Updated in August, 2025

As of the end of August, 2025

The Denka Group operates environmental and quality management systems to proceed with continuous improvements.

Status of ISO14001 (Environmental Management System) certification acquisition
Site Name	Register Number
Omi Plant	19362328-2A
Omuta Plant	JP021970
Chiba Plant	JP023535
Shibukawa Plant	JP022052
Ofuna Plant	JP022976
Isesaki Plant	JP025228
Gosen Site	JP024903
Denka Innovation Center	JP026087
Denka Singapore Seraya Plant	10597162
Denka Singapore Merbau Plant	10442121
Denka Advantech Tuas Plant	SG004431
Denka Construction Solutions Malaysia	C734760
Denka Advanced Materials Vietnam	4410416940004
Denka Advanced Materials (Suzhou)	CN041503
Denka Electronics Materials Dalian	CN050348
Hinode Kagaku Kogyo^*1	KES2-0622
Company-wide coverage ratio (%)	64%

*1We have acquired Kyoto Environmental Standard (KES) Step 2 certification according to ISO standards and are working on continuous improvements.
*2Company-wide coverage ratio = Number of ISO14001 certified sites / Number of key production group companies × 100

Status of ISO9001 (Quality Management System) certification acquisition
Site Name	Register Number
Omi Plant	JP025718
Omuta Plant	JP023219
Chiba Plant	JP026048
Shibukawa Plant	JP023240
Ofuna Plant	JP024116
Isesaki Plant	JP022573
Denka Innovation Center	JP024569
Denka Singapore Seraya Plant	10216321
Denka Singapore Merbau Plant	14002
Denka Advantech Tuas Plant	99-2-0984
Denka Advantech South Plant	2015-2-2293
Denka Construction Solutions Malaysia	C662335
Denka Advanced Materials Vietnam	4410018940004
Denka Advanced Materials (Suzhou)	CN041504
Denka Electronics Materials Dalian	CN050349
Denka Inorganic Materials (Tianjin)	N.CN23-22591A
Denka Performance Elastomer	10001143 QM15
Denka Polymer	JUSE-RA-1970
Denka Elastlution	JP021891
Kyusyu Plastic Industry	JP022847
Denka Astec Co., Ltd. Kasai Plant	JA0107-24Q-1
Company-wide coverage ratio (%)	84%

*1Call individual sites for the certified products from each site.
*2Company-wide coverage ratio = Number of ISO9001 certified sites / Number of key production group companies × 100

Status of ISO13485 (Medical Devices and In-Vitro Diagnostic Medical Devices Quality Management System) certification acquisition
Certification System	Site Name	Register Number
ISO13485	Gosen Site	Q5 055720 0003

Status of IATF16949 (Automotive Industry Quality Management System) certification acquisition
Certification System	Site Name	Register Number
IATF16949	Omuta Plant	0451115
IATF16949	Chiba Plant	0555513

Status of Occupational Health and Safety Management System certification acquisition
Certification System	Site Name	Register Number
ISO45001	Chiba Plant	JP024552
OSHMS	Omi Plant	10-15-6
ISO45001	Denka Singapore Seraya Plant	10597161
ISO45001	Denka Advantech Tuas Plant	SGOO4609
ISO45001	Denka Advanced Materials Vietnam	C703177

ISO14001 and ISO45001 integrated into one management system
Certification System	Site Name	Register Number
ISO14001&ISO45001	Denka Singapore Seraya Plant	10667089

Status of ISO28000 certification acquisition
Certification System	Site Name	Register Number
ISO28000	Denka Singapore Seraya Plant	53602

ISO50001 (Energy Management) certification acquisition
Certification System	Site Name	Register Number
ISO50001	Denka Singapore Seraya Plant	10474031

ISCC-PLUS (International Sustainability and Carbon Certification)
Certification System	Site Name	Register Number
ISCC-PLUS	Denka Singapore Seraya Plant	ISCC-PLUS-Cer-DE100-13931123
	Denka Polymer Goi Plant	ISCC-PLUS-Cert-DE100-19445124
	Denka Polymer Sakura Plant	ISCC-PLUS-Cert-DE100-20226124
	Denka Polymer Katori Plant	ISCC-PLUS-Cert-DE100-20231124