Mitani Corp. engages in construction, energy, information systems, and multifaceted development businesses. It operates through the following segments: Information Systems-Related Business, Enterprise Supply-Related Business, and Energy and Lifestyle-Related Business. The Information Systems-Related Business segment deals with solution development, software product development, and hardware and network maintenance services. The Enterprise Supply-Related Business segment offers construction materials and petroleum products. It also handles leasing business, wind power generation, plastic product processing, and medical equipment sales. The Energy and Lifestyle-Related Business segment provides cable television, internet, ready-mixed concrete, and liquefied petroleum gas. It also manages long-term care, car dealership, and gas station businesses. The company was founded by Yahei Mitani in March 1914 and is headquartered in Fukui, Japan.