Kraftia 

Kraftia Corporation engages in design, construction, and installation of power infrastructure construction business in Japan. The company offers distribution line, under line, and underground line works; and electrical work for commercial buildings, office buildings, factories, educational and cultural facilities, resort facilities, and renewable energy power plants. It is also involved in the design, construction, and maintenance of various wastewater treatment, water supply, and recycling facilities; renewable energy generation business; and provision of building out FTTH networks that supply broadband connectivity to residences, updating cable TV equipment, and building base stations for mobile phone carriers, as well as fiber optic cable and communication cable installation services. In addition, the company engages in ecological, private finance initiative, overseas, and olive businesses; and provision of teleradiology systems. The company was formerly known as Kyudenko Corporation and changed its name to Kraftia Corporation in October 2025. Kraftia Corporation was incorporated in 1944 and is headquartered in Fukuoka City, Japan.