| 1897 |
Sumitomo Copper Rolling Works founded. |
| 1911 |
Sumitomo Electric Wire and Cable Works established. |
| 1911 |
Sumitomo Electric Wire and Cable Works established |
| 1911 |
Sumitomo Electric succeeded in the practical application of lead-coated power cables for the first time in Japan, demonstrating a further leap in technology. These cables were used for power transmission from Kyoto Dento's thermal power plant in Fushimi to Kyoto City. |
| 1914 |
Developed trolley wire. |
| 1933-10 |
The SUMITOMO ELECTRIC TECHNICAL REVIEW (Japanese edition) was first published. |
| 1945 |
Although the war had ended, plants had been hit hard by air strikes and were in a desperate situation. After expressing appreciation to the employees for all their past efforts, then-President Sadao Bekku said that Japan must now rebuild itself as a cultural nation, and that Sumitomo Electric's products are essential to achieving this, and therefore, the company must strive to manufacture products for achieving its mission in whatever form the company would take. In addition to electric wires, Sumitomo Electric also manufactured daily necessities, and other agricultural tools, using materials on hand. |
| 1950 |
Typhoon Jane was a large typhoon that hit Osaka in September 1950, inflicting damage with 336 people dead, 500,000 victims, and 15,000 houses collapsing mainly in the Kansai region. The western plant of Osaka Works was flooded by water. Aluminum overhead transmission cables bound for India were submerged by floodwaters. Although the products could have been made usable by washing them, management decided to re-make them all, with no thought of gain. This clearly shows our traditional spirit of devoting ourselves wholeheartedly to supplying quality products and placing prime importance on reliability. |
| 1954 |
Succeeded in achieving domestic production of oil-tempered wire |
| 1955 |
Since the start of research in 1955, we have developed air springs mainly for railway cars. |
| 1961 |
Sumitomo Electric's Dywidag sleepers were adopted for use in the Tokaido Shinkansen, with full-fledged delivery starting in the following year. |
| 1962 |
Dywidag railway sleepers and air suspension for railway ties |
| 1962 |
In 1962, we developed a diaphragm air spring in cooperation with Sumitomo Metal Industries, Ltd. and supplied to private rail cars and bullet train cars. |
| 1963 |
The English edition of the SUMITOMO ELECTRIC TECHNICAL REVIEW was launched. |
| 1964 |
Sumitomo Electric's parabolic antennas for syncom satellites were used at the 1964 Tokyo Olympic Games, enabling the world's first satellite TV broadcasting of the Olympics. |
| 1970 |
Started production of compound semiconductors. |
| 1970 |
Established first overseas factory in Thailand. |
| 1970 |
EXPO' 70 provided power cables, steel cords for moving walkways and traffic game. |
| 1974 |
Completed the Tokyo Traffic Control Center, one of world's largest. |
| 1974 |
Started production of optical fiber cables. |
| 2022-01 |
The SUMITOMO ELECTRIC TECHNICAL REVIEW celebrated its 200th issue. |
| 2022-04 |
The 94th issue of the English edition was published. |
