MS Asuka II is a cruise ship owned and operated by Nippon Yusen Kaisha. It was originally built by the Mitsubishi Heavy Industries shipyard in Nagasaki Japan as MS 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. As of February 2009 it is the largest cruise ship in Japan.
Builders of the MS Asuka II are Mitsubishi Heavy Industries and Nagasaki.