The Sumitomo Mitsui Construction Company, Ltd. (三井住友建設株式会社) is a Japanese general construction company based in the Chuo ward of Tokyo. The company traces it routes back to 1887, when Nishimoto-Gumi, the predecessor of Mitsui Construction, was established. This company was incorporated in 1941.[1] The current company was formed in 2003 when Mitsui Construction and Sumitomo Construction agreed to merge.[3] The company is part of the Mitsui Group and Sumitomo Group.