Keystone Powdered Metal Company

Sumitomo Copper Rolling Works, which formed the basis of Sumitomo Electric Wire and Cable Works, the predecessor to Sumitomo Electric Industries, Ltd., was established in 1897. The nation was experiencing a severe recession as a reaction to an entrepreneurial boom following the Sino-Japanese War (1894-1895). In the wake of Sumitomo's acquisition of Japan Copper Manufacturing Co., Ltd. in March of this year, Sumitomo Copper Rolling Works was established.

Sumitomo Copper Rolling Works founded

Sumitomo Electric Wire and Cable Works established 1911

Developed trolley wire

First delivery of trolley wires to Tokyo City

The Sumitomo Electric Technical Review originally began as Sumitomo Densen Iho in 1933, when we operated as Sumitomo Electric Wire & Cable Works.

first published in October 1933 as our technical journal

Sumitomo Electric Copper Rolling Works, which formed the basis of Sumitomo Electric Wire and Cable Works, was established in 1897. The nation was experiencing a severe recession as a reaction to an entrepreneurial boom following the Sino-Japanese War (1894-1895). In the wake of Sumitomo's acquisition of Japan Copper Manufacturing Co., Ltd. in March of this year, Sumitomo Copper Rolling Works was established.

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.

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.

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.

Succeeded in achieving domestic production of oil-tempered wire

Since the start of research in 1955, we have developed air springs mainly for railway cars.

Sumitomo Electric's Dywidag sleepers were adopted for use in the Tokaido Shinkansen in 1961, with full-fledged delivery starting in the following year.

Dywidag railway sleepers and air suspension for railway ties

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.

In 1963, the English edition was launched in anticipation of the globalization of the market.

English edition was launched in 1963

Sumitomo Electric Parabolic antenna Tokyo Olympic Games 1964

Started production of compound semiconductors

Established first overseas factory in Thailand

EXPO' 70 Provide power cables, steel cords for moving walkways and traffic game

Completed the Tokyo Traffic Control Center, one of world's largest

Started production of optical fiber cables

Established first overseas factory in Thailand

In 2021, a printed version of the publication was discontinued in consideration of the environmental impact and the COVID-19 pandemic, making the journal available only at our website.

celebrated its 200th issue in January 2022

94th issue was published in April 2022