Updated August 2026
As of August 2026
The Denka Group operates environmental and quality management systems to promote continuous improvement.
| Site name | Registration No. |
|---|---|
| Omi Plant | 19362328-2A |
| Omuta Plant | JP025729 |
| Chiba Plant | JP027377 |
| Shibukawa Plant | JP025673 |
| Isesaki Plant | JP025228 |
| Gosen Site | JP024903 |
| Denka Innovation Center | JP026087 |
| Denka Singapore Pte. Ltd. | 10712791 |
| Denka Singapore Merbau Plant | 10692780 |
| DENKA ADVA-TECH TOAS FACTORY | SG004431 |
| DENKA CONSTRUCTION SOLUTIONS MALAYSIA | C734760 |
| DENKA ADVANCED MATERIALS VIETNAM | 4410416940004 |
| Denka Advanced Materials (Suzhou) | CN056515 |
| Denka Electronics Materials Dalian | CN050348 |
| Hinode Chemical Industry ※1 | KES1-1635 |
| Company-wide coverage rate (%) | 60% |
| Site name | Registration No. |
|---|---|
| Omi Plant | JP025718 |
| Omuta Plant | JP026213 |
| Chiba Plant | JP026048 |
| Shibukawa Plant | JP026991 |
| Isesaki Plant | JP026453 |
| Denka Innovation Center | JP024569 |
| Denka Singapore Pte. Ltd. | 10712791 |
| Denka Singapore Merbau Plant | SGTRQ2603 |
| DENKA ADVA-TECH TOAS FACTORY | 99-2-0984 |
| DENKA ADVA-TECH 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) | 00925Q11594R0S |
| Denka Performance Elastomer | 10001143 QM15 |
| Denka Polymer | JUSE-RA-1970 |
| Denka Elastlution | JP025541 |
| Kyushu Plastic Industry | JP026577 |
| DENKA ASTEC KASAI PLANT | JA0107-24Q-1 |
| TOYO STYRENE Goi Plant | JP026048 |
| TOYO STYRENE KIMITSU PLANT | JCQA-0123 |
| Company-wide coverage rate (%) | 84% |
| Certification system | Site name | Registration No. |
|---|---|---|
| ISO13485 | Gosen Site | Q5 055720 0003 |
| Certification system | Site name | Registration No. |
|---|---|---|
| IATF16949 | Omuta Plant | 0572500 |
| Chiba Plant | 0555513 | |
| DAPL TOAS Factory | 0587109 |
| Certification system | Site name | Certification number |
|---|---|---|
| ISO45001 | Chiba Plant | JP024552 |
| OSHMS | Omi Plant | 10-15-6 |
| ISO45001 | Denka Singapore Pte. Ltd. | 10597161 |
| ISO45001 | DENKA ADVA-TECH TOAS FACTORY | SGOO4609 |
| ISO45001 | DENKA ADVANCED MATERIALS VIETNAM | C703177 |
| Company-wide coverage rate (%) | 20% | |
| Certification system | Site name | Certification number |
|---|---|---|
| ISO14001&ISO45001 | Denka Singapore Pte. Ltd. | 10667089 |
| Certification system | Site name | Certification number |
|---|---|---|
| ISO28000 | Denka Singapore Pte. Ltd. | 10667089 |
| Certification system | Site name | Certification number |
|---|---|---|
| ISO50001 | Denka Singapore Pte. Ltd. | 10716259 |
| Certification system | Site name | Certification number |
|---|---|---|
| ISCC-PLUS | Denka Singapore Pte. Ltd. | ISCC-PLUS-Cert-DE100-13931125 |
| Denka Polymer Goi Factory | ISCC-PLUS-Cert-DE100-19445126 | |
| Denka Polymer Sakura Plant | ISCC-PLUS-Cert-DE100-20226125 | |
| Denka Polymer Katori Plant | ISCC-PLUS-Cert-DE100-20231125 | |
| Chiba Plant | ISCC-PLUS-Cert-DE100-19445126 | |
| Isesaki Plant (Ota) | ISCC-PLUS-Cert-DE100-26329125 | |
| DENKA SINGAPORE | ISCC-PLUS-Cert-DE100-26533125 | |
| TOYO STYRENE CO., LTD. Goi Plant | ISCC-PLUS-Cert-DE100-20062126 | |
| TOYO STYRENE KIMITSU PLANT | ISCC-PLUS-Cert-DE100-20063126 | |
| Company-wide coverage rate (%) ※ | 24% | |
Inclusion in SRI (socially responsible investment) and ESG indices and ratings
As of August 31, 2026 The Denka Group operates environmental and quality management systems to promote continuous improvement. ...
The following two members of the Infrastructure Solutions Department have received the "Prestressed Concrete Institute Award (Paper Award)": - KENTARO SUHIRA, Group Leader, Infrastructure Solutions Department - HIROTO KODATE, Assistant Manager, Omi Plant
The following is an announcement regarding the receipt of awards by the Department Manager of the Infrastructure Solutions Research Department, Minoru Morioka. Morioka has received two awards: the "JSCE Yoshida Award (Paper)" and the "Japan Concrete Institute Award (Merit)". ...
At the 2019 Electrical Engineering Society Conference held in September 2019 (Iwate University), Shuhei Aoyama of the Denka Innovation Center Advanced Technology Research Institute received the...
Senior Technical Advisor (STA) Masahiro Ibukiyama of the New Business Development Department received the Minister of Economy, Trade and Industry Award at the 2023 Industrial Standardization Project Awards hosted by the Ministry of Economy, Trade and Industry (METI). The award ceremony was held on October 8, 2023.
The uruoi global website operated by Denka Corporation (New York, USA) has been recognized with the "Honorable Mention" award at the "awwwards", a global web design award.
Denka Company Limited consolidated subsidiary Denka Seiken Co., Ltd. Reagent Department Manager Yasuki Ito says, "The automatic analyzer for measurement of small, dense LDL-C (Note 1) ...
At the 39th Research Meeting of the Society for Micro and Nano Systems (CHEMINAS39) held at Kanazawa University on May 27-28, Denka INOV...
An article published in the March 2019 issue of the Royal Society of Chemistry's academic journal "Analyst" introduced the results of a collaborative study conducted with the University of Tokyo on the use of a chemical substance that can be used to detect the presence of microplastics in the environment.
The resolution of corporate value creation stories is improved. Descriptions of materiality and roadmaps...
A report showing the full picture of the Company-wide reform campaign aimed at returning to a growth trajectory. By spreading integrated thinking, we...
This year's report that meets expectations "Words, systems, and participation for the future" in a concrete way...
Director, NPO Circulating Society Research InstituteTAMIO YAMAGUCHI
Director, NPO Circulating Society Research InstituteTAMIO YAMAGUCHI
Director, NPO Circulating Society Research InstituteTAMIO YAMAGUCHI
Director, NPO Circulating Society Research InstituteTAMIO YAMAGUCHI