Totetsu Kogyo Co Ltd is a construction company. Its operating segments are Civil Engineering, Railway track maintenance, Architectural and Environmental segment. It undertakes various projects such as construction, renovation, reinforcement of elevated bridges and railway platform edge doors for passenger protection along with building new railway tracks for the Shinkansen, public and private sectors. The company is also engaged in construction and maintenance of station buildings for railway lines, apartment houses, office buildings, hotels, shops, and schools. Additionally, it also provides environmental technology and services, like construction of solar power generation systems, greening of buildings, and implementing energy conservation systems for air conditioning.