Daiichi Sankyo, Inc. (DSI) Established in 2006 by the merger of two 100-year-old Japanese pharmaceutical companies, we inherited a rich legacy of innovation and scientific expertise across therapeutic categories. Today, we're just as dedicated to improving quality of life for the patients who need our medicines as our founders were a century ago. Our scientific expertise, robust pipeline and collaborative and ethical culture make a world of difference in the lives of patients, employees, and in the communities in which we live and work.