Kaimei Maru
Kaimei Maru was a cargo steamship. She was launched in Hong Kong in 1919 as War Bomber, a War Standard ship for the UK Shipping Controller. Soon after she was completed, Lloyd Royal Belge bought her, renamed her Pionier, and registered her in Belgium. In 1930, Compagnie Maritime Belge took over Lloyd Royal Belge, and Pionier became part of CMB's enlarged fleet. In 1939, Agencia Marítima Carmar, Limitada bought Pionier, renamed her Carmar, and registered her in Panama.
In 1941, Kaiyo Kisen KK bought Carmar, renamed her Kaimei Maru, and registered her in Japan. That November, the Imperial Japanese Army requisitioned her as a troopship. That December, she took part in the Japanese invasion of the Philippines. In 1942, Tochigi Shoji KK acquired Kaimei Maru from Kaiyo Kisen KK. In September 1942, a United States Navy submarine sank Kaimei Maru off the coast of Japan, killing ten of the steamship's crew.
''War Bomber''
War Bomber was a War Standard Type B cargo ship. Early in 1919, the UK Shipping Controller ordered her from Hong Kong and Whampoa Dock in Hong Kong, who built her as yard number 563. She was the largest ship that any Hong Kong shipyard had yet built. Her registered length was, her beam was, her depth was, and her draught was. Her tonnages were ; ; ; and5,226 tons displacement. She had a single screw, driven by a three-cylinder triple-expansion engine. It was rated at 517 NHP, and gave her a speed of. She was a coal-burner.
She was launched on 1 August 1919, in the presence of Sir Paul Chater, the Director of the Hong Kong and Whampoa Dock Company; and Sir Claud Severn, the acting Governor of Hong Kong. In October 1919 she was completed, and the Hong Kong and Whampoa Dock Company launched her sister ship, War Trooper. War Bombers UK ownership seems to have been very brief. Lloyd's Register records no UK official number, port of registration, or UK code letters for her.
''Pionier'' and
Soon after War Bomber was built, Lloyd Royal Belge bought her, renamed her Pionier, and registered her in Antwerp. By 1922 her code letters were MPKE. In 1930, Compagnie Maritime Belge took over Lloyd Royal, and Pionier became part of the merged fleet, managed by Agence Maritime Internationale. Also by 1930, the ship was equipped with wireless direction finding. By 1934, her wireless telegraph call sign was ORWA, and this had superseded her code letters.In 1939, Agencia Marítima Carmar, Limitada bought Pionier, renamed her Carmar, and registered her under the Panamanian flag of convenience. Her wireless call sign was HPKA.
''Kaimei Maru''
In 1941, Kaiyo Kisen KK bought Carmar, renamed her Kaimei Maru, and registered her in Kobe. Her wireless call sign was JSNO. On 13 November 1941, the Imperial Japanese Army requisitioned her as a troopship.Invasion of the Philippines
Kaimei Maru was assigned to Army group 262, which supported the 14th Army troops, comprising elements of the 16th Division and 48th Division taking part in the invasion of the Philippines. Kaimei Maru was one of about 20 Japanese army transports carrying about 7,000 troops under the command of Count Hisaichi Terauchi, Lieutenant General Masaharu Homma and Major-General Susumu Morioka for the Japanese invasion of Lamon Bay, Luzon in December 1941. The invasion fleet was supported by elements of the Imperial Japanese Navy, including the IJN Southern Force under Vice Admiral Nobutake Kondō, IJN Philippines Invasion Group under Vice Admiral Ibō Takahashi and specialist forces of the Philippines Invasion Unit, 1st Base Force HQ under Rear Admiral Kyuji Kubo in command of the cruiser.At 15:00 hrs on 17 December 1941, the Japanese invasion fleet left Koniya, Amami Oshima. It comprised the troopships Kaimei Maru, Bengal Maru,, Durban Maru, Kayo Maru, Kitano Maru,,, Nagato Maru, Nichiren Maru, Ryoka Maru, Ryuyo Maru, Shinsei Maru,, Taian Maru, Tatsuno Maru,,, Toyohashi Maru and Tamon Maru No. 5. The IJN escort fleet comprised the light cruiser Nagara, the heavy cruiser, destroyers,,,,,, minelayers and, minesweepers No. W-7 and No. W-8, submarine chaser and, auxiliary gunboats,, and, and auxiliary netlayer. The fleet reached Lamon Bay at 02:00 hrs on 24 December 1941, and the landings faced relatively little resistance.
Convoys
On 26 January 1942, Kaimei Maru left Tsingtao in a southbound convoy with Durban Maru, Fuji Maru, Kayo Maru, Kofuku Maru, Lisbon Maru, Nichiren Maru, Shinsei Maru and Ume Maru. The destroyer, auxiliary gunboat, and minelayer escorted the convoy. It safely reached the Taichow Islands on 30 January 1942.On 2 February 1942, Kaimei Maru left Makō in Taiwan in a convoy to Haiphong in Vichy-ruled Indochina with Durban Maru, Fuji Maru, Kayo Maru, Kofuku Maru, Lisbon Maru, Shinsei Maru and Ume Maru. The torpedo boat escorted the convoy. While the convoy was leaving the harbor, Lisbon Maru struck a Japanese defensive mine, killing 19 members of her crew. Lisbon Maru was towed to a nearby island and beached.
Later in 1942, Tochigi Shoji KK of Wakamatsu-ku bought Kamei Maru.
Loss
In early September 1942, Kaimei Maru left Nagoya for Karafuto Prefecture via Otaru to load coal, in convoy with the cargo ships and.On 4 September, the US Navy submarine, on her first patrol, attacked Kaimei Marus convoy at Kuji Bay off the northeast coast of Honshu. At 16:40 hrs, Guardfish fired one torpedo, which hit one of Kaimei Marus holds. She sank at 17:20 hrs at and ten members of her crew were killed. During the attack, Guardfish also sank Chita Maru and Tenryu Maru. When Kaimei Maru sank, Tochigi Shoji KK were still her owners.