The Yokogawa Group has achieved ISO 14001 certification primarily at its major offices and manufacturing sites in Japan and abroad.
| Countries | Company name |
|---|---|
| Japan | Yokogawa Electric Corporation |
| Yokogawa Manufacturing Corporation | |
| Yokogawa Test & Measurement Corporation | |
| Yokogawa Solution Service Corporation | |
| USA | Yokogawa Corporation of America |
| Canada | Yokogawa Canada, Inc. |
| Mexico | Yokogawa de Mexico, S.A. de C.V. |
| Brazil | Yokogawa America do Sul Ltda. |
| Chile | Yokogawa America do Sul (Chile) |
| Colombia | Yokogawa Colombia S.A.S. |
| Germany | Rota Yokogawa GmbH & Co.KG |
| China | Yokogawa China Co., Ltd. |
| Yokogawa Electric China Co., Ltd. | |
| Yokogawa Sichuan Instrument Co., Ltd. | |
| Yokogawa Shanghai Instrumentation Co., Ltd. | |
| South Korea | Yokogawa Electric Manufacturing Korea Co., Ltd. |
| Yokogawa Electric Korea Co., Ltd. | |
| Taiwan | Yokogawa Taiwan Corporation |
| Singapore | Yokogawa Electric International Pte. Ltd. |
| Yokogawa Engineering Asia Pte. Ltd. | |
| Yokogawa Electric Asia Pte. Ltd. | |
| Indonesia | P.T. Yokogawa Indonesia |
| P.T. Yokogawa Manufacturing Batam | |
| Malaysia | Yokogawa Analytical Solutions Sdn. Bhd. |
| Yokogawa Electric (Malaysia) Sdn. Bhd. | |
| Yokogawa Kontrol (Malaysia) Sdn. Bhd. | |
| Yokogawa Industrial Safety Systems Sdn. Bhd. | |
| Philippines | Yokogawa Philippines, Incorporated |
| Thailand | Yokogawa (Thailand) Ltd. |
| Vietnam | Yokogawa Vietnam Company Limited |
| Australia | Yokogawa Australia Pty Ltd. |
| New Zealand | Yokogawa New Zealand Limited |
| Bahrain | Yokogawa Middle East & Africa B.S.C.(c) |
| Yokogawa Engineering Bahrain W.L.L | |
| Saudi Arabia | Yokogawa Saudi Arabia Company L.L.C. |
| Yokogawa Service Saudi Arabia Company L.L.C. | |
| Oman | Yokogawa Oman Limited L.L.C. |
| Qatar | Yokogawa Qatar QFZ LLC |
| UAE | Yokogawa UAE Industry - Sole Proprietorship L.L.C. |
| Yokogawa Engineering Middle East & Africa FZE | |
| Nigeria | Yokogawa Nigeria Limited |
| Yokogawa Services Solutions Nigeria Limited | |
| South Africa | Yokogawa South Africa (Pty) Ltd. |
| Yokogawa African Anglophone Regions (Pty) Ltd. |
* Yokogawa Electric Corporation and Yokogawa Manufacturing (covered branches: Headquarters, Kofu Factory, Komagane Factory, Kanazawa Factory and Komine Factory) has integrated the ISO14001 certification.