Ōmi MaruŌmi Maru was the name of Japanese cargo ship owned by Nippon Yusen Kaisha, Tokyo. The name Ōmi Maru derives from Ōmi province.HistoryIn 1912, Ōmi Maru entered NYK service along with vessels which were known as sister ships in the NYK fleet. In the early years of what became World War II, Ōmi Maru was commandeered by the Imperial Japanese Navy for use as a troopship. The ship was torpedoed and sunk south of the Caroline Islands by the submarine on December 28, 1942.