The Nichiryu Maru (Nitiryu Maru) was a 5,447 gross register ton cargo ship built by Asano Ship Building Company, Tsurumi in 1919 as Rozan Maru. She was the third ship of the Yoshida Maru No 1-class of 25 standard cargo ships (referred to as Type B at the time) built by Asano Shipyard (one was built at the Uraga Dock Company) between 1918 and 1919.[2] In April 1929, she was acquired by Karafuto Kisen Kabushiki Kaisha and in 1931, renamed Karafuto Maru.[3] On 22 November 1937, she was acquired by Nissan Kissen Kabushiki Kaisha and renamed Nichiryu Maru.[3] She was requisitioned by the Imperial Japanese Army during World War II.
Fate
On 6 January 1943, while steaming as part of a convoy, carrying two companies of the 3rd Battalion, 102nd Infantry Regiment and medical supplies for the garrison at Lae, was hit by bombs from a Royal Australian Air ForcePBY Catalina aircraft, and was sunk at 06°30'S, 149°00'E. Destroyers rescued 739 of the 1,100 troops on board, but the ship took with it 361 soldiers and all of Okabe's medical supplies.