DKK Co., Ltd. (6706.T) manufactures and sells telecommunication equipment and high-frequency induction heating systems in Japan and internationally. The company, founded in 1950 and headquartered in Tokyo, operates primarily in two segments: Telecommunication, which encompasses antennas for ultra high frequency, very high frequency, high frequency, medium frequency, and low frequency applications; steel towers and reflector panels; community antenna cable television (CATV) equipment and systems; consumer wireless devices; mobile communication base station antennas and towers; broadcasting and microwave antennas; disaster prevention systems including digital radios, monitoring cameras, and evacuation towers; infrastructure products such as LED aviation obstacle lights, wind power towers, and telescopic masts; and defense-related equipment; and High Frequency-Related, which includes high-frequency induction heating equipment for automotive components like crankshafts, camshafts, and axles, construction machinery parts, high-frequency generators for plasma in semiconductor and nuclear fusion applications, power supplies for high-frequency accelerators, vacuum furnaces, and high-frequency hardening services. Other activities involve equipment leasing and electric power sales. In 2023, DKK completed mergers with DKC Co., Ltd. and Koshuha Co., Ltd. as the surviving entity, acquired shares in Cybercore Co., Ltd., and transitioned to the Tokyo Stock Exchange Prime Market in 2022; more recently, it authorized share repurchase programs including one in May 2025 for up to 650,000 shares representing 7.02% of its capital, canceled 1,000,000 treasury shares, and reversed general reserves to enhance shareholder returns.