is a British-registered cruise ship owned and operated by Princess Cruises. She began operation in March 2004 and primarily cruises in Asia during the northern hemisphere summer and Australia during the southern hemisphere summer. She is a subclassed Grand-class
ship, which is also known as a Gem-class ship. Diamond Princess
and her sister ship, Sapphire Princess
, are the widest subclass of Grand
-class ships, as they have a 37.5-metre beam, while all other Grand
-class ships have a beam of 36 metres. Diamond Princess
and Sapphire Princess
were both built in Nagasaki, Japan, by Mitsubishi Industries.