ISO (International Organization for Standardization) has developed a series of international standards on environmental management. The Environmental Management and Environmental Auditing series were published in September 1996 (revised in November 2015). In Japan, JISQ14001 was published as guidelines or environmental standards in October 1996 (revised in November 2015).
In an effort to respond to the recognized environmental standards, Daido Steel started the construction of a system using the Hoshizaki Plant as a model, in September 1995. In August 1996, Daido Steel became the first company in the specialty steel industry in Japan to be certified, and the second after Nagoya Works of Nippon Steel (at that time) in the iron and steel industry.
The entire Daido Group will continue to promote certification activities and continual improvement in its environmental management system.
Certified Plants
| Plant Name | Certification Date | Registration Number | Certification body |
| Hoshizaki Plant | August 19, 1996 | E003 | JICQA |
|
Chita Plant (including Chita Second Plant, Chita Forging Plant, Kimitsu Plant, Chita Steel Strip Plant, and Oji Plant) on Feb. 2 in 1998 |
February 2, 1998 | E022 | |
| Shibukawa Plant | February 2, 1998 | E020 | |
| Tsukiji Techno Center (including Metal Powder Plant) | August 26, 1998 | E041 | |
| Electronic Materials dept. (LED Section) | December 12, 2005 | 00017585 | LRQA |
The following 17 group companies have obtained ISO 14001 certification
| Company Name | Certification Date | Registration Number | Certification body |
| Tohoku Steel Co., Ltd. | January 27, 2000 | E116 | JICQA |
| Japan Drop Forge Co., Ltd. | April 12, 2001 | E268 | JICQA |
| Fuji OOZX Inc. | July 17, 2001 | JAER0295 | JARI-RB |
| Daido Electronics Co., Ltd. | November 9, 2003 | JMAQA-E446 | JMA |
| Daido Kogyo Co., Ltd. | December 10, 2003 | JP08/070556 | SGS Japan Inc. |
| Daido Precision Industries Ltd. | January 29, 2004 | E772 | JICQA |
| Shimomura Tokushu Seiko Co., Ltd. | February 26, 2004 | E788 | JICQA |
| Daido EcoMet Co., Ltd. | July 1, 2004 | E876 | JICQA |
| Daido Electronics (Thailand) Co., Ltd. | July 19, 2004 | EMS85777 | BSI |
| Nissei Seiko Co., Ltd. | October 8, 2004 | JQA-EM4269 | JQA |
| Riken Seiko Co., Ltd. | December 16, 2004 | E968 | JICQA |
| Toyo Sangyo Co., Ltd. | January 18, 2005 | JE0484G | JIA-QA |
| Daido Electronics (Suzhou) Co., Ltd. | March 23, 2005 | 02222E3068R6M | CNAS |
| Daido Die & Mold Steel Solutions Co., Ltd. | June 9, 2005 | E1074 | JICQA |
| Nippon Seisen Co., Ltd. (Hirakata Factory and Higashi-Osaka Factory) | September 15, 2005 | JMAQA-E584 | JMA |
| Daido Castings Co., Ltd. | December 12, 2005 | JMAQA-E592 | JMA |
| Sakurai Kosan Co., Ltd. | July 13, 2006 | 08579-B | Intertek Certification Japan Ltd. |