Jun'yō Maru (順陽丸) was a cargo steamship that was built in Scotland in 1913, served a succession of British owners until 1927, and was then in Japanese ownership until a Royal Navy submarine sank her in 1944.
Saikyō Maru (西京丸) was a steamship that was built in 1888 in Scotland for Japanese merchant service. She was requisitioned for service in the First Sino-Japanese War of 1894–95 and the Russo-Japanese War of 1904–05. She was scrapped in 1927.
The Japanese aircraft carrier Taiyō was the lead ship of her class of three escort carriers. She was originally built as Kasuga Maru (春日丸), the last of three Nitta Maru class of passenger-cargo liners built in Japan during the late 1930s for NYK Line. The ship was requisitioned by the Imperial Japanese Navy (IJN) in early 1941 and was converted into an escort carrier. Taiyō was initially used to transport aircraft to distant air bases and for training, but was later used to escort convoys of merchant ships between Japan and Singapore. The ship was torpedoed twice by American submarines with negligible to moderate damage before she was sunk in mid-1944 with heavy loss of life.
Arisan Maru was a 6,886 GRT Type 2A freighter constructed in 1944 during World War II and was one of Imperial Japan's hell ships. The vessel, named for a mountain on Formosa, was initially used as a troop transport. The vessel was then turned over for use for the transportation of prisoners of war (POWs) from the Philippines to Manchuria, China or Japan. On October 24, 1944, the ship was torpedoed by an American submarine and sank. Of the 1,781 POWs aboard, all of them escaped the sinking ship but were not rescued by the Japanese. In the end, only nine of the prisoners survived the sinking.
Awazisan Maru (淡路山丸), also known as Awajisan Maru or Awagisan Maru, was a motor cargo vessel built by Tama Zosensho of Tamano for Mitsui & Co. Ltd. with intention of serving on their Yokohama to New York route. The ship remained in service between Japan and United States for two years before being requisitioned by the Imperial Japanese Army. She was bombed and damaged during her first Army mission and subsequently torpedoed and sunk by a Dutch submarine in December 1941.
Kembu Maru also Kenmu Maru (Kanji:健武丸) was a 6,816 GRT cargo ship which was built in 1941 Taikoo Dockyard & Engineering Company of Hong Kong Ltd. She was built as Empire Blossom and was ready to be launched when Hong Kong was invaded by Japan in December 1941. The ship was completed by the Japanese and put into service. On 4 December 1943 she was damaged by American bombing at Kwajalein Atoll, sinking the next day.
Gyōkū Maru (暁空丸) was a 6,854 GRT cargo ship that was laid down 6 December, 1941 as Empire Dragon by Hong Kong & Whampoa Dock Co Ltd, Hong Kong for the Ministry of War Transport (MoWT). She was seized by the Japanese on 26 December, 1941 with the fall of Hong Kong and completed as Gyōkū Maru in August, 1943, serving until September 1944 when she was torpedoed and sunk by USS Thresher in the Yellow Sea.
Kokai Maru was a Japanese cargo steamship. She was built in Hokkaido in 1939, and sunk in the Pacific Ocean by United States Navy aircraft in 1944.
The SS China Maru was a 5,870-gross register ton cargo ship built by Kawasaki Dockyard Company, Kobe, for Kawasaki Kisen KK in 1920.
Tama Maru No. 2 was a 264 gross register tons (GRT) whaler built by Mitsubishi Jukogyo Kabushiki Kaisha, Kobe for Taiyo Hogei Kabushiki Kaisha in 1936. She was requisitioned in 1941 by the Imperial Japanese Navy during World War II and converted into a minesweeper. On 10 March 1942, during the invasion of Lae-Salamaua, Tama Maru No. 2 was damaged by Douglas SBD Dauntless dive bombers from the United States Navy aircraft carriers USS Lexington and USS Yorktown off Lae, New Guinea.
Aikoku Maru (愛国丸) was an armed merchant cruiser of the Imperial Japanese Navy in World War II. The ship entered service in 1940, the ship was later converted to an ammunition ship. She was sunk in February 1944 during Operation Hailstone.
Compañía de Filipinas was a cargo steamship that was built in Scotland in 1890 for the Compañía General de Tabacos de Filipinas (CGTF). In the Philippine–American War the Navy of the First Philippine Republic armed her as its flagship and renamed her Filipinas. After that war she reverted to her original name and commercial service. In the Second World War, Japanese forces captured her and renamed her Hoei Maru. She was sunk in July 1945, shortly before the end of the war.
Nissan Maru was a Japanese cargo ship completed in 1939 owned by Nissan Kisen K.K. that was requestioned for service as an auxiliary collier and oiler by the Imperial Japanese Navy during World War II. She served with the 5th Fleet and was sunk by United States Army Air Forces bombers during the Japanese occupation of Kiska in the Aleutian Islands Campaign.
Tōkō Maru No. 2 Go was a Japanese fishing trawler that was requisitioned by the Imperial Japanese Navy during World War II and served as an auxiliary stores ship.
Banshu Maru No. 52 was an auxiliary minesweeper of the Imperial Japanese Navy during World War II.
Hokkai Maru was a Kinai Maru-class auxiliary transport of the Imperial Japanese Navy during World War II. She participated in the Japanese occupation of British Borneo and was part of ill-fated convoy HI-71.
Hokkai Maru was a rescue tug of the Imperial Japanese Army during World War II. She was the first of three ships of her class succeeding the Shōkai Maru class of high-powered tugboats.
Suzuya Maru was an auxiliary transport and hell ship of the Imperial Japanese Navy during World War II.
Hakuyo Maru was an auxiliary submarine chaser of the Imperial Japanese Navy during World War II.
Katori Maru was a steam ocean liner of the Empire of Japan. She was built in Nagasaki in 1912–13. In the Second World War the Imperial Japanese Navy requisitioned her as a troop ship. In 1941 a Royal Netherlands Navy submarine sank her off the coast of Sarawak.
Empire of Japan 
