Mitsui O.S.K. Lines Ltd. engages in the provision of marine transport services. It operates through the following segments: Dry Bulk Business, Energy Business, Container Ship Business, Real Estate Business, Related Business and Car Carrier, Port Logistics, Ferry and Coastal RORO Ship Business. The Dry Bulk Business includes dry bulkers, oil tankers, LNG carriers, and car carriers. The Energy Business owns and operates tramp vessels such as oil tankers and LNG carriers. The Container Ship Business owns and operates container ships. The Car Carrier, Port Logistics, Ferry & Coastal RORO Ship Business owns and operates car carriers. The Real Estate Business is engaged in real estate business, including land and building rental business and building management business. The Related businesses include cruise business, tugboat business, trading company business, etc. The company was founded on December 28, 1942 and is headquartered in Tokyo, Japan.