Diamond Princess is a large cruise ship owned and operated by Princess Cruises. She began operation in March 2004 and primarily cruises in Alaska during the summer and the Asia in the winter. Her only sister ship is the Sapphire Princess as both were built in Japan by Mitsubishi Heavy Industries although these vessels share many features with Ruby Princess Emerald Princess and Crown Princess and together all five vessels are referred to as Gem Class.
Builder of the Diamond Princess (ship) is Mitsubishi Heavy Industries.