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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.

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The Akagi Maru-class armed merchant cruiser was a class of three armed merchant cruisers of the Imperial Japanese Navy.

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America Maru was the second of three high speed passenger liners built for the Oriential Steamship Company. Converted into an armed merchantman during the Russo-Japanese War of 1904–1905, she played a crucial role in the Battle of Tsushima. Although used as a hospital ship during the early part of World War II, she had been chartered by the IJN as a transport in 1943, and was sunk by the United States Navy in 1944 with great loss of civilian lives.

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Hōkoku Maru (報國丸) was an armed merchant cruiser of the Imperial Japanese Navy in World War II. She was the name ship of her class. The ship entered service in 1941, and was employed as a commerce raider and submarine tender. She was sunk in a surface action in November 1942.

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Kongō Maru (金剛丸) was an 7,043 gross register ton passenger-cargo ship built by Harima Shipbuilding Company in Japan for Kokusai Kisen Kabushiki Kaisha in 1935. She was requisitioned by the Imperial Japanese Navy during the Second World War and converted to an armed merchant cruiser.

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The Kongō Maru-class armed merchant cruiser was a class of two armed merchant cruisers of the Imperial Japanese Navy.

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Shinano Maru (信濃丸) was a 6,388 GRT merchantman operated by the Nippon Yusen K.K Shipping Company (NYK). She was built by W. Henderson Co in Glasgow, for the express purpose of serving NYK's Japan to Seattle route. NYK originally intended that she be built at the Mitsubishi Nagasaki shipyards in Japan; however, Mitsubishi had experienced problems in the completion of Hitachi Maru, which had led to considerable delays. NYK chose not to wait, and Shinano Maru was ordered to Scotland. She was completed in April 1900. During the Russo-Japanese War Shinano Maru was converted into an armed merchantman. She has the distinction of discovering the Russian Fleet near Tsushima Strait on the eve of the Battle of Tsushima. After the war Shinano Maru reverted to civilian use, being scrapped in 1951.