Mitani Corp is in the businesses of Information systems, Construction, Energy and other businesses. The firm's information systems business comprises of system integration focusing on planning, developing, managing and supporting computer systems, networks, and software as well as the sale of related devices. Construction business develops, sells and manages construction materials. Its energy business sells oil, petrochemical products, coal and liquid petroleum gas. Other businesses of the firm include wind power, industrial equipment, storage facilities, lease services, restaurant management and senior lifestyle businesses.