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Kyowanissei Co.,Ltd. is a Japanese enterprise specializing in construction and civil engineering. The company organizes its operations into four principal divisions: Building Equipment, Gas Equipment, Gas Pipe, and Electrical Construction & Civil Engineering. Their broad range of services includes comprehensive gas infrastructure work, encompassing the installation of gas equipment, pipeline laying, and related road paving. They also provide vital maintenance for gas pipelines, including repair and leakage solutions, alongside propane gas system and hot water system installations. In the realm of building services, Kyowanissei delivers full-spectrum solutions for heating, hot water supply, ventilation, and air conditioning. This extends to the integration of contemporary energy systems such as solar cells, fuel cells, and battery storage. They further offer maintenance for commercial air conditioners and a variety of building utilities, including water supply, drainage, and aeration systems. Additionally, the company undertakes general electrical construction, installation, and upkeep. Their civil engineering capabilities cover general works like water supply development, road surface repairs, and irrigation projects. They also engage in the construction of factory plants, fire suppression systems (sprinkler and inert gas), and exterior landscaping. Beyond their core construction and engineering activities, Kyowanissei Co.,Ltd. provides pipe inspection services, vehicle leasing, and functions as a non-life insurance agent. Established in 1887, the company's headquarters are situated in Tokyo, Japan.