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"Ural Maru" was a combined cargo/passenger vessel owned and operated by Osaka Shosen (the predecessor to Mitsui OSK Lines). She was completed in 1929 by the Mitsubishi Nagasaki Shipyards and was in regularly scheduled service between Kobe and Osaka in Japan and the port of Dairen in the Kwantung Leased Territory on the Asian mainland. "Ural Maru" made her first voyage on 12 April 1929.