The "16DDH" class is a new type of helicopter destroyer (DDH) currently under construction for use by the Japanese Maritime Self Defense Force. It is planned to replace the Haruna class destroyers currently in use. The new ships will be the largest combatant ship operated by Japan since the end of the Imperial Japanese Navy. In design it resembles an aircraft carrier or amphibious assault ship.
The class' code-name (16DDH) derives from the Japanese calendar, specifically the 16th year of the Heisei reign (2004), when the provisional title was given