The Nippon Yusen Kabushiki Kaisha , also known as NYK Line, is a Japanese shipping company. The company headquarters are located in Chiyoda, Tokyo, Japan. It operates a fleet of over 800 ships, which includes container ships, tankers, bulk and woodchip carriers, roll-on/roll-off car carriers, reefer vessels, LNG carriers, and cruise ships. It is a member of the Ocean Network Express and Mitsubishi Group.

Roll-on/roll-off ships are cargo ships designed to carry wheeled cargo, such as cars, motorcycles, trucks, semi-trailer trucks, buses, trailers, and railroad cars, that are driven on and off the ship on their own wheels or using a platform vehicle, such as a self-propelled modular transporter. This is in contrast to lift-on/lift-off (LoLo) vessels, which use a crane to load and unload cargo.