| 1917 February |
Founded Tokai Electric Wire Works to start manufacturing and sales of bare wires and shielded wires
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| 1917 December |
Reorganized the works and founded Tokai Electric Wire Co., Ltd.
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| 1931 July |
Entered into technology and capital alliance with Sumitomo Electric Wire & Cable Works (now Sumitomo Electric Industries, Ltd.)
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| 1957 |
Started production of ARB (Rubber-insulated low-voltage wires for automobiles) |
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| 1959 May |
Completed the special works for wiring harnesses and started operations
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| 1959 February |
Started production of wiring harnesses for two-wheeled vehicles
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| 1960 | Started production of wiring harnesses for three-wheeled vehicles | |||
| 1961 January |
Started production of wiring harnesses for four-wheeled vehicles and equipment
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| 1965 July |
Opened Sayama Works that operated as a service station for automakers in the Kanto region
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| 1967 February |
Merged with Izumi Electric Wire Co., Ltd. and opened the Sakai Plant
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Opened the Suzuka Plant, Tokyo Branch, and Osaka Branch
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| 1970 March |
Opened the Osaka Plant and relocated the Sakai Plant
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| 1973 September |
Opened the Nagoya Branch |
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| 1975 |
Completed and introduced Tokai-style kanban methods |
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| 1977 May |
Completed the works for high-voltage noise-prevention wires for automobiles at the Suzuka Plant |
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| 1978 |
Established a corporation in Brazil, the first overseas corporation |
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| 1978 October |
Completed the research hall at the Suzuka Plant
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| 1979 December |
Completed the wiring-harness component works at the Suzuka Plant
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| 1984 April |
Completed the headquarters office
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| 1985 April |
Changed the trade name to Sumitomo Wiring Systems, Ltd.
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| 1986 November |
Listed stocks in the second section of the Nagoya Stock Exchange
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| 1991 |
Started production of electronic units |
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| 1995 |
Established Harness System Technologies Research, Ltd. jointly with Sumitomo Electric Industries, Ltd. (now AutoNetworks Technologies, Ltd.)
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| 1997 October |
The Suzuka Plant obtained the first ISO 14001 Certification in the group |
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| 1998 |
Completed the radio frequency anechoic chamber at the Suzuka Plant
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| 1999 June |
Completed the Suzuka Technical Center at the Suzuka Plant
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| 1999 May |
Acquired Volkswagen Bordnetze in Germany |
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| 2001 |
Opened the Business Development Office for Electronic Modules to expand the electronic module business |
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| 2001 March |
Established SEWS-CABIND S.p.A. in Italy. Acquired the wiring harness business from Cabind Automotive S.p.A. to begin full-scale operations in Italy |
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| 2002 |
Started structural reforms to rebuild the domestic production system and focus on the car business |
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| 2002 July |
Acquired the wiring harness business from Calsonic Kansei and purchased stocks in Kyohritsu Hiparts |
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| 2004 July |
Withdrew from the power line business which had continued since the foundation of the company |
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| 2004 November |
Purchased stocks in Kyungshin Industrial in Korea |
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| 2005 February |
Incorporated a two-headquarters system consisting of the Yokkaichi Headquarters and Tokyo Headquarters
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| 2006 March |
Acquired Volkswagen Bordnetze in Germany |
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| 2006 May |
Completed the technical center at the Yokkaichi Headquarters
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| 2007 August |
Delisted stocks from the Nagoya Stock Exchange through a stock swap with Sumitomo Electric Industries, Ltd. |
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| 2008 April |
12Vision (08-12 year middle management plans) starts. |
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| 2008 July |
Established SE Wiring Systems Egypt S.A.E in Egypt. |
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| 2008 September |
Established SE Bordnetze Tunisia S.A.R.L. in Tunisia. |
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| 2009 June |
Moved Head Office(Tokyo) to Shibaura.
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