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1897 to 1950
1897 - Sumitomo Copper Rolling Works was founded
1900 - Started production of coated wires
1908 - Started production of power cables
1909 - Started trial production of telecommunication cables
1911 - Established Sumitomo Electric Wire & Cable Works; Laid first Japan-made high-voltage underground cables
1916 - Opened a new factory ; Started production of enamel wires
1920 - Sumitomo Electric Wire & Cable Works incorporated as a limited?company
1931 - Started production of cemented carbide tools
1932 - Started production of special steel wires
1939 - Company name changed to the current name, Sumitomo Electric Industries, Ltd.
1941 - Opened the Itami Works
1943 - Started production of vibration-proof rubber products and fuel tanks
1946 - Opened a brand office in Tokyo
1948 - Started marketing sintered powder metal products
1949 - Entered into the construction business of overhead transmission lines
1951 to 2000
1957 - Delivered the first Japan-made television broadcasting antennas
1961 - Opened the Yokohama Works; Delivered the wiring harnesses for four-wheel vehicles for the first time in its history
1962 - Started production of the Irrax Tube electron beam irradiation tubes; The head office was moved from Osaka's Konohana Ward to its present location in Chuo Ward
1963 - Started production of disc brakes
1964 - Started production of electron beam irradiation wires
1968 - Entered into the traffic control systems business
1969 - Established the first overseas production subsidiary in Thailand?; Started development of flexible printed circuits
1970 - Started production of compound semiconductors
1971 - Opened the Kanto Works1974-Started production of optical fiber cables
1975 - Contracted to construct a power transmission line in Iran
1976 - Received an order for a large telecommunications network construction project in Nigeria
1978 - Delivered and put into operation the world's first bidirectional fiber optics CATV system called “Hi-OVIS”
1981 - Delivered and installed fiber optic LAN systems for the first time in its history
1982 - Succeeded in producing the world's-largest-class synthetic diamonds
1996 - Developed a technology for producing long-length oxide high voltage superconducting wires
1998 - Developed and started marketing ecology wires and cables
1999 - Sumitomo Electric Fine Polymer, Inc. started operation
2001 to present
2001 - J-Power Systems Corporation started operational
2002 - Sumitomo Electric Networks, Inc. , Sumitomo Steel Wire Corp. and Sumitomo Electric Wintec, Inc. started operation
2003 - Sumiden Hitachi Cable Ltd. and Sumitomo Electric Hardmetal Corp. started operation
2004 - A.L.M.T. Corp. was made a wholly owned subsidiary
2006 - The HTS cable used in a power transmission grid in the U.S. started supplying electricity
2007 - Sumitomo Wiring Systems, Ltd. was made a wholly owned subsidiary; Nissin Electric Co., Ltd. was made a consolidated subsidiary
2008 - Opened Technical Training Center
2009 - Eudyna Devices Inc. was made a wholly owned subsidiary and changed its trade name to Sumitomo Electric Device Innovations, Inc.
2010 - Opened WinD Lab, a new laboratory building; SEI Optifrontier Co., Ltd. Started lightwave network product business
2011 - Commenced “Demonstration of Megawatt-Class Power Generation/Storage System” at Osaka Works, and at Yokohama Works in 2012
2012 - Obtained the world's first certification of Thunderbolt, an optical cable which began commercial production; Established joint research on “Commercialization and Construction Technology for Offshore Wind Power Generation Plants Regional Promotion Aqua-Wind Commercialization Study Group.”
2013 - Constructed manufacturing base for automotive aluminum electric wire in Thailand.
