Sekisui House (積水ハウス, Sekisui Hausu) is one of Japan's largest homebuilders. It was founded on August 1, 1960 and is headquartered in Osaka. In 2009, Sekisui House expanded into Australia and Russia before expanding into China and the United States the following year. The company has origins in and is affiliated with ja:積水化学工業 (Sekisui Chemical), which once was a major chemical firm, but has since diversified due to Asian competition; they supply medical diagnostic lab equipment and manufacture pharmaceuticals worldwide. The chemical firm has over 100 subsidiaries and affiliates.