Southeast Asia, South Asia & Oceania
- Automotive
- Infocommunications
- Electronics
- Environment & energy
- Industrial materials
- Others
- India
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SEI Trading India Pvt. Ltd. Sumi Motherson Innovative Engineering Ltd. SWS India Management Support & Service Pvt, Ltd.
- Indonesia
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PT. Karya Sumiden Indonesia PT. SEI Consulting Jakarta PT. Sumi Indo Kabel Tbk. PT. Sumi Indo Wiring Systems PT. Sumiden Hardmetal Manufacturing Indonesia PT. Sumiden Serasi Wire Products PT. Sumiden Sintered Components Indonesia PT. Sumitomo Electric Hardmetal Indonesia PT. Sumitomo Electric Wintec Indonesia PT. Sumitomo Wiring Systems Batam Indonesia
- Philippines
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Daikoku Electronics (Phils.) Inc. First Sumiden Circuits, Inc. International Electric Wires Phils. Corp. IWS Realty Corporation International Wiring Systems (Phils.) Corporation Pilipinas Kyohritsu Inc. SDE (Philippines) Corp. SEI (Philippines) Incorporated Sumi Philippines Wiring Systems Corporation Sumidenso Automotive Technologies Asia Corporation
- Thailand
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A.L.M.T. (Thailand) Co.,Ltd. SEI Thai Electric Conductor Co., Ltd. S.E.I. Thai Holding Co., Ltd. SEWS Asia Technical Center SEWS-Components (Thailand) Ltd. Sumitomo Electric (Thailand) Ltd. Sumitomo Electric Hardmetal Manufacturing(Thailand), Ltd. Sumitomo Electric Sintered Components (Thailand) Co., Ltd. Sumitomo Electric Wintec (Thailand) Co., Ltd. Sumitomo Electric Wiring Systems (Thailand), Ltd. SWS Sales & Marketing (Thailand) Co., Ltd.
- Vietnam
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SEI Electronic Components (Vietnam), Ltd. SEWS-COMPONENTS VIETNAM CO., LTD. Sumi Vietnam Wiring System Co., Ltd. Sumiden Vietnam Automotive Wire Co., Ltd. Sumidenso Vietnam Co., Ltd. SUMI-HANEL Wiring Systems Co., Ltd. Sumitomo Electric Interconnect Products (Vietnam), Ltd. Sumiden Device Innovations Vietnam Co., Ltd.
- Australia
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SEI Carbide Australia Pty Ltd. SWS Australia Pty Ltd.