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Company

Taisho ~

02.1918
Established in the former Osaka Shosen Building in front of the Yaesu exit of Tokyo as a lighting power equipment and power transmission and distribution contractor “Yamaka Shokai”.

Showa~

09.1948
Changed the trade name to “Yamaka Electric Co., Ltd.”
10.1945
Established Sendai branch office (currently Tohoku power transmission business headquarters)
03.1950
Japan’s first 275,000 volt transmission line construction begins Hokuriku trunk line construction
07.1958
Established Nagoya Sales Office (currently Chubu Transmission Division)
03.1959
Established Osaka Sales Office (currently Solution Division (Kansai))
05.1958
Received an order for construction of a transmission line between Danimu Saigon in the Republic of South Vietnam at that time, and became the first Japanese electrical contractor to expand overseas.
06.1965
Received an order for TEPCO’s Boso line construction, which attracted attention as Japan’s first 500,000 volt transmission line
12.1974
Received an order for new transmission line construction work for the Mekong River development project in Laos, wiring in Vientiane city, and new construction / expansion / repair of each substation.
09.1976
Received an order from Iran for construction of a transmission line with 12 lines and a total length of 900 km.
08.1986
Received an order for optical fiber construction from a domestic electric power company and promoted technological development for the communication information industry.
10.1988
Received an order for Japan’s first 1 million volt transmission line construction work (Gunma Yamanashi trunk line)

Heisei ~

10.2006
Continued to receive orders for 1 million volt transmission line construction work (Minami-Iwaki trunk line)
02.2007
Listed on the Japan Securities Dealers Association (currently the JASDAQ market of the Tokyo Stock Exchange) and increased the capital to 742.55 million yen.
12.2008
Established Development Division (currently Electric Power Infrastructure Division)
03.1998
Increased capital to 823.06 million yen
05.2006
Increased capital to 989.66 million yen
07.2008
Established Ishinomaki Sales Office in Ishinomaki City, Miyagi Prefecture
02.2009
Dispatched supervisor to Dar es Salaam, Republic of Tanzania to build transmission lines
08.2010
Established a new equipment center in Zao Town, Miyagi Prefecture
02.2012
Made Tokyo Management Co., Ltd., which operates a building management business, a wholly owned subsidiary
12.2012
Headquarters moved to Toshima-ku, Tokyo
08.2013
Developed “Enark 160”, a tower raising device
09.2014
Concluded a supervisor contract for trunk transmission line construction in Myanmar and implemented construction
12.2015
Received an order for 30 MW large-scale solar construction work from LG CNS Japan Co., Ltd. (Fukushima Prefecture)
06.2016
Received an order from Canadian Solar Project Co., Ltd. for the construction of the Saitama Minano Power Plant, which is a high-difficulty work to be carried out on a steep slope of up to 45 degrees.
08.2016
Obtained a patent right for the tower raising device “Enark 160”
08.2017
Moved Sendai Transmission Business Department (currently Tohoku Transmission Business Headquarters) to the center of Aoba Ward, Sendai City, Miyagi Prefecture.
12.2017
Changed the trade name to “ETS Holdings, Inc.”
02.2018
Concluded a partner contract with the Independence Support Organization for Persons with Disabilities

Reiwa ~

05.2001
Concluded a business alliance agreement with Navik
06.2001
Completed construction of an extra-high voltage substation that receives 154,000 volts at a 55MW solar power plant (Gifu Prefecture)
09.2001
Moved Kansai Sales Office to Higashikoraibashi, Chuo-ku, Osaka
10.2001
Moved Chubu Transmission Division to Shimizu, Kita-ku, Nagoya City, Aichi Prefecture
11.2001
Completed construction of an extra-high voltage substation that receives 154,000 volts at a 62MW solar power plant (Aichi Prefecture)
06.2003
Venture company from Kyoto University that deals with ecosystem surveys
Business tie-up with Sunlit Seed Rings Co., Ltd. (Kyoto)
08.2003
Acquired a solar power plant (Ukiha City, Fukuoka Prefecture)
09.2003
Made Iwai Kogyo Co., Ltd. a wholly owned subsidiary
12.2003
Made Yuuki Sangyo Co., Ltd. a wholly owned subsidiary
02.2004
100th anniversary of founding

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