日本郵船
MS is a cruise ship owned and operated by Nippon Yusen Kaisha. She was originally built by the Mitsubishi Heavy Industries shipyard in Nagasaki, Japan, as Crystal Harmony for Crystal Cruises. In 2006, "Crystal Harmony" was transferred from the fleet of Crystal Cruises to that of Crystal's parent company, Nippon Yusen Kaisha, and entered service under her current name. , she was the largest cruise ship in Japan.