Mitsubishi Motors was originally the automobile production division of Mitsubishi Heavy Industries, but was spun off as an independent company. Nissan Motor is Mitsubishi Motors' largest shareholder. Mitsubishi Motors develops and produces various passenger cars, trucks, as well as related parts and components. Its subsidiaries also provide automotive financing and leasing services. While the company has R&D and production sites in Japan, where it is headquartered, it also has many offices in North America, South America, Europe, and Asia. Its production sites are particularly concentrated in Asia.