RMS Empress of Japan was an ocean liner built in 1929–1930 by Fairfield Shipbuilding & Engineering Company at Govan on the Clyde in Scotland for Canadian Pacific Steamships (CP). This ship was the second of two CP vessels to be named Empress of Japan – regularly traversed the trans-Pacific route between the west coast of Canada and the Far East until 1942.

The Fairfield Shipbuilding and Engineering Company, Limited, was a Scottish shipbuilding company in the Govan area on the Clyde in Glasgow. Fairfields, as it is often known, was a major warship builder, turning out many vessels for the Royal Navy and other navies through the First World War and the Second World War. It also built many transatlantic liners, including record-breaking ships for the Cunard Line and Canadian Pacific, such as the Blue Riband-winning sisters RMS Campania and RMS Lucania. At the other end of the scale, Fairfields built fast cross-channel mail steamers and ferries for locations around the world. These included ships for the Bosporus crossing in Istanbul and some of the early ships used by Thomas Cook for developing tourism on the River Nile.