The Group has acquired the international standard ISO14001 certification at domestic and overseas production sites.
The percentage of production sites that have acquired ISO14001* is as follows. (as of July 2024)
・Domestic: 100% (all 6 production sites, all 22 domestic consolidated subsidiaries nationwide)
・Overseas: 76% (34 out of 45 overseas group companies)
* Production sites of the domestic and overseas consolidated companies are covered.
| Chiba Works | Nikko Works |
| Hiratsuka Works | Mie Works |
| Yokohama Works | Copper Foil Division |
| Okano Electric Wire Co., Ltd. | Foam Kasei Co., Ltd. |
| KANZACC Co., Ltd. | Furukawa Automotive Systems Inc. |
| Shoden Seiwa Co., Ltd. | Furukawa Precision Engineering Co., Ltd. |
| Furukawa Fitel Optical Device CO.,LTD | Furukawa Techno Material Co., Ltd. |
| Furukawa Industrial Plastics Co., Ltd. | Furukawa Magnet Wire Co., Ltd. |
| Furukawa Electric Industrial Cable Co., Ltd. | Riken Electric Wire Co., Ltd. |
| Furukawa Network Solution Corp.* | Furukawa Sangyo Kaisha, Ltd. |
| Furukawa Electric Power Systems Co., Ltd. | Furukawa Electric Advanced Engineering Co., Ltd.* |
| Miharu Communications Inc. | Furukawa Electric Ecotec Co., Ltd.* |
| The Furukawa Battery Co., Ltd. | Furukawa Nikko Power Generation Inc. |
| NTEC Ltd. | FURUKAWA ELECTRIC BUSINESS & LIFE SUPPORT INC.* |
* Included in the Furukawa Electric Co., Ltd. business site
| OFS Fitel, LLC | Furukawa Circuit Foil Taiwan Corporation |
| Furukawa Mexico S.A. de C.V. | Furukawa Electric Copper Foil Taiwan Co., Ltd. |
| Furukawa Electric LatAm S.A. | Furukawa FITEL (Thailand) Co., Ltd. |
| OFS FITEL Deutschland GmbH | Furukawa Automotive Systems (Thailand) Co., Ltd. |
| Trocellen Italy S.p.A. | SIAM Furukawa Co., Ltd. |
| Polifoam Plastic Processing Co., Ltd. | Furukawa Precision (Thailand) Co., Ltd. |
| OFS RUS Fiber Optic Cable Company | Permintex Furukawa Autoparts Malaysia Sdn. Bhd. |
| Furukawa FITEL Optical Products (Shanghai) Co., Ltd. | Furukawa Automotive Parts (Vietnam) Inc. |
| Shenyang Furukawa Cable Co., Ltd. | Furukawa Automotive Systems Vietnam Inc. |
| Suzhou Furukawa Power Optic Cable Co., Ltd. | FURUKAWA ELECTRIC THERMAL MANAGEMENT SOLUTIONS AND PRODUCTS LAGUNA, INC. |
| Furukawa Electric (Shenzhen) Co., Ltd. | Furukawa Automotive Systems Lima Philippines, Inc. |
| Furukawa AVC Electronics (Suzhou) Co., Ltd. | FURUKAWA ELECTRIC AUTOPARTS PHILIPPINES INC. |
| Chongqing Changhua Automobile Harness Co., Ltd. | P.T. Furukawa Optical Solutions Indonesia |
| Wuhan Furukawa Automotive Systems Co., Ltd. | P.T. Tembaga Mulia Semanan, Tbk. |
| Furukawa Auto Parts (Huizhou) Co., Ltd. | P.T. Furukawa Automotive Systems Indonesia |
| Furukawa Automotive Parts (Dong Guan) Ltd. | Furukawa Minda Electric Private Limited |
| Taiwan Furukawa Magnet Wire Co., Ltd. | PT. FURUKAWA INDOMOBIL BATTERY MANUFACTURING |