Mitsui Ocean Fuji is a Japanese cruise ship operated by the Mitsui OSK Lines.
It was built as the Seabourn Odyssey for Seabourn Cruise Line in 2009. Mitsui OSK Lines, under their new brand Mitsui Ocean Cruises, purchased the ship in February 2023. She remained leased to the former operator until September 2023. Mitsui acquired this relatively small ship for her suitability for cruising the Seto Inland Sea.[2] The ship arrived in Yokohama in September 2024, where she underwent a major refit.
The ship's namesakes are Mount Fuji and the cruise ship Fuji Maru, which the company operated until 2013.[3] The ship will be based in Japan.[4] The ship embarked on her maiden voyage under the new name from Yokohama on 1 December 2024.[5]