Mitsui O.S.K. Lines Ltd. engages in the provision of marine transport services that include bulkships, bulk carriers, tankers, liquefied natural gas carriers, and container vessels. Its operates through the following segments: Bulkships, Containerships, Ferry and Coastal RoRo Ships, Associated Business, and Others. The Bulkships segment includes dry bulkers, oil tankers, LNG carriers, and car carriers. The Containerships segment operates containerships, container terminals, and transportation agency. The Ferry and Coastal RoRo Ships segment provides passenger, automobiles, trucks and domestic cargo transport services. The Associated Business segment provides includes real estate, cruise business, tugboat industry, trading business, construction and personnel dispatch. The Others segment includes ship operations, ship management, ship building and financing. The company was founded in April 1964 and is headquartered in Tokyo, Japan.