| Company name | Commercial manufacturing sites | Obtained ISO certification (Month-Year) |
|---|---|---|
| Astellas Pharma Inc. | Takahagi Technology Center | ISO14001 (July 1998) |
| Yaizu Technology Center | ISO14001 (October 2000) | |
| Toyama Technology Center | ISO14001 (March 2000) | |
| Takaoka Plant | ISO14001 (November 2000) | |
| Astellas Pharma Europe B.V. | Meppel Plant | ISO14001 (January 2001) ISO45001 (June 2019) |
| Astellas Ireland Co., Ltd. | Dublin Plant | ISO14001 (March 1997) ISO45001 (September 2020) |
| Kerry Plant | ISO14001 (December 2003) ISO45001 (December 2018) ISO46001 (September 2024) ISO50001 (April 2012) | |
| Astellas Pharma China, Inc. | Shenyang Plant | ISO14001 (October 2001) |