Sumitomo Densetsu Co.,Ltd., together with its subsidiaries, operates as a construction company in Japan, Indonesia, Thailand, Cambodia, Myanmar, the Philippines, China, and Malaysia. It provides construction services, such as electrical systems, air-conditioning and plumbing systems, electrical instrumentation, and plant construction systems. The company is involved in the planning, design, construction, and maintenance of overhead and underground transmission, electrical substations, and electrical power distribution systems; and interconnected systems to supply electricity from new energy facilities, including photovoltaic, wind, and hydroelectric power stations. It also engages in the construction of photovoltaic, redox flow battery, and biomass power-generating systems; provision of engineering services for various systems, such as electrical work and electrical instrumentation in factories and plants; and establishment of facility management system and building energy management and automation systems. In addition, the company is involved in the consultation, system design, construction, operation, and maintenance of communication/broadcasting infrastructure; and the design, establishment, operation, and maintenance of information networks for various companies, universities, hospitals, data centers, etc. Further, it engages in the planning, construction, and maintenance of plant machines used in various manufacturing plants, air-conditioning and plumbing systems in factories, office buildings, and hotels. The company was formerly known as Taiyo Kudo Construction Co., Ltd. and changed its name to Sumitomo Densetsu Co., Ltd. in July 1985. Sumitomo Densetsu Co.,Ltd. was incorporated in 1950 and is headquartered in Osaka, Japan. Sumitomo Densetsu Co.,Ltd. is a subsidiary of Sumitomo Electric Industries, Ltd.