Sumitomo Mitsui Construction Co Ltd is a construction company based in Japan. The company is primarily engaged in designing, engineering and executing civil projects which mainly include skyscrapers and high-rise buildings. It uses various technologies, such as controllable wide wall column, inverted construction method, lead rubber isolator, flat lead plug rubber, and dustless shotcrete method to construct high rise buildings and tunnel branching. It also engages in real estate trading, leasing, and management services.