History

1925Nihon Musen Denshin KK (Japan Wireless Telegraph Company) founded as a national policy company
1929Yosami Radio Transmitting Station begins operations
1950DKK Co., Ltd. established as a second company of the former national policy company
Starts the design, manufacture, construction, and renovation of telecommunications facilities and equipment
1952Beginning the manufacture of applied high-frequency devices and heat treating services using high frequencies
1959Beginning of over-the-counter trading on the Tokyo Stock Exchange
1960Construction of the Kawagoe Plant (present Kawagoe Office), beginning the manufacturing of radio towers and other steel structures
1961Listing on the Second Section of the Tokyo Stock Exchange
1968Construction of the Atsugi Plant. Expansion of applied high-frequency equipment manufacturing and heat treating contract work
1972Construction of the Kanuma Plant. Beginning of antenna manufacturing operations
1990Listing on the First Section of the Tokyo Stock Exchange
1990Establishment of DKK Shino- Thai Engineering CO., Ltd., an affiliated company in Thailand specializing in design and construction of communications steel towers
1991Opening of the Ebino Techno Center. Beginning of maintenance and operating services for Very Low Frequency/high output transmission facilities
1997Closure of the Yosami Radio Transmitting Station, drawing the curtain on 70 years of history
1999Ohtakadoya-yama Transmitter: Beginning of maintenance and operating services for Japan Standard Time transmitter
200050th anniversary of DKK’s founding
2001Hagane-yama Transmitter: Beginning of maintenance and operating services for Japan Standard Time transmitter
2002Installation of digital television broadcasting antenna on Tokyo Tower (broadcasting commencing in 2003)
2004Establishment of DKK’s high-frequency device affiliate in North America, DKK of America, Inc.
2012Establishment of DKK (THAILAND) Co., Ltd., an affiliated company in Thailand to serve both in the Telecommunication section and the High frequency application section.
Establishment of DKK’s high-frequency device affiliate in China, Denki Kogyo (Changzhou) Heat Treatment Equipment Co., Ltd.
2013Establishment of DKK MANUFACTURING (THAILAND) CO., LTD., an affiliated company in Thailand as an overseas manufacturing plant both for the Telecommunication section and the Induction Heating section.
2017Establishment of DTHM,S.A.DE C.V.an affiliated company for contract heat treating in the high-frequency division in Mexico
2018Establishment of KOREA DENKIKOGYO.CO.,LTD. as overseas production and maintenance base in the high-frequency division in Korea
2019Establishment of DKK North America, Inc. as a sales base of antenna in the U.S.A.
Establishment of Wireless R & D center (Yokohama) as a research and development base.
2021Established Future Research Center in Yokohama, Kanagawa Prefecture to pursue research and development activities aimed at developing new business areas that will drive the Company’s future.
2022Transition to the Prime Market of the Tokyo Stock Exchange.
2023Carried out merger by DKK Co., Ltd. as the surviving company and DKC Co., Ltd., Koshuha Co., Ltd as a dissolved companies
2023Acquired shares of Cybercore Co., Ltd.

Progress of Denki Kogyo