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Subsidiaries and Affiliated Companies
Overseas Sales Organizations
| Country and Region | Company Name |
| USA | Oki Semiconductor America, Inc. |
| Germany | Oki Semiconductor Europe GmbH |
| France | Oki (France) sarl |
| Korea | Oki Semiconductor Korea Co., Ltd. |
| China | Oki Semiconductor Shanghai Co., Ltd. |
| Hongkong | Oki Electronics (Hong Kong) Ltd. |
| Taiwan | Oki Semiconductor Taiwan Inc. |
| Singapore | Oki Semiconductor Singapore Pte. Ltd. |
| India | Oki Semiconductor Singapore Pte. Ltd. Bangalore Branch |
Overseas Production Company
| Country and Region | Company Name |
| Thailand | Oki (Thailand) Co., Ltd. |
Overseas Design Companies
| Country and Region | Company Name |
| China | Oki Semiconductor Shanghai Co., Ltd. |
Domestic Production Companies
- OKI SEMICONDUCTOR MIYAZAKI CO., LTD.
- OKI SEMICONDUCTOR MIYAGI CO., LTD.
- OKI SEMICONDUCTOR TAMA CO, LTD.
- Oki Environment Technology Inc.
Domestic Design Companies
- Oki Micro Design Co.,Ltd.
- Oki Technocollage Inc.
- Oki Network LSI Co.,Ltd.
