SS Dainichi Maru (Mitsui Bussan, 1922)

SS Dainichi Maru was a Japanese troop- and Hell ship that was torpedoed by the United States Navy submarine USS Gurnard in the South China Sea west of Luzon, Philippines in the Luzon Strait at (18°48′N 119°21′E), while she was travelling in Convoy 772 from Takaoka, Japan, to Manila, Philippines.[1]

History
Name
  • Japan SS Ibukisan Maru (1922-1935)
  • Empire of Japan SS Dainichi Maru (1935–1944)
OwnerImperial Japanese Navy
BuilderMitsui Senpaku K. K.
Yard number35
Laid down14 August 1920
Launched21 July 1921
Completed15 May 1922
In service15 May 1922
Out of service8 October 1943
IdentificationIMO/Off. no.: 28537
FateTorpedoed and sunk by USS Gurnard, 8 October 1943
General characteristics
TypeIwatesan Maru-class auxiliary troopship
Tonnage5,813 GRT
Length117.3 metres (384 ft 10 in)
Beam15.5 metres (50 ft 10 in)
Depth11 metres (36 ft 1 in)
Installed powerA single triple expansion steam engine
PropulsionOne screw propeller
Speed10 knots

Construction

Dainichi Maru was laid down on 14 August 1920 at the Mitsui Senpaku K. K. shipyard in Tokyo, Japan. She was launched on 21 July 1921 and was completed on 15 May 1922. She was built for the Mitsui Line and was named Ibukisan Maru. She was renamed Dainichi Maru when she was bought by the Japanese company Itaya OSK Lines on 6 June 1935.[2]

Dainichi Maru was 117.3 metres (384 ft 10 in) long, with a beam of 15.5 metres (50 ft 10 in) and a depth of 11 metres (36 ft 1 in). The ship was assessed at 5,813 GRT. She had a single triple expansion steam engine rated at 488 nominal horsepower and driving one screw. She had one funnel and two masts.[3]

World War II career

On 15 September 1941, the Imperial Japanese Army charted Dainichi Maru for use as a troopship.[4]

Dainichi Maru participated as a troopship in Operation "M", the Japanese invasion of Lamon Bay, Philippines beginning on 17 December 1941 as the convoy departed Setouchi, Japan. The invasion force arrived at their destination on 24 December 1941 at 2 am, with the invasion proceeding without strong opposition.[4]

During the early stages of the war, Dainichi Maru would go on to complete several voyages as a hell ship across southeast Asia, carrying many Allied prisoners of war (POWs).[4]

Sinking

On 8 October 1943, Dainichi Maru was part of Convoy 772, which consisted of five ships, including the cargo- and troopship Taian Maru and three other ships, escorted by a torpedo boat. At the time, Dainichi Maru was carrying 2,274 members of the 11th Independent Garrison Unit and 14th Army Workshop alongside their equipment.[4]

The convoy was attacked in the South China Sea west of Luzon, Philippines in the Luzon Strait, while it was travelling from Takaoka, Japan, to Manila, Philippines, by the American submarine USS Gurnard at 1.39 am after the submarine had been stalking the convoy since midnight. The Gurnard went on to torpedo and sink both the Taian Maru and Dainichi Maru in the attack. 45 military personnel and 32 crew went down with Taian Maru as she sank, while on Dainichi Maru between 2,025 and 2,057 military personnel and 32 crew were killed.[5]

Wreck

The wreck of Dainichi Maru lies at (18°48′N 119°21′E). The condition of the wreck is currently unknown.[3]

References
  1. "論文集" (PDF). jsu.or.jp. Retrieved 26 April 2023.
  2. "Dainichi Maru (+1943)". theshipslist.com. 31 December 2011. Retrieved 26 April 2023.
  3. "Mitsui Bussan Kaisha Mitsui Steamship Co. Ltd / Kobe Mitsui Sempaku K.K., Tokyo 1876-1964". wrecksite.eu. 14 January 2010. Retrieved 26 April 2023.
  4. "IJA Transport DAINICHI MARU". combinedfleet.com. 2017. Retrieved 26 April 2023.
  5. "Dictionary of American Fighting Ships, Vol. III, 1968, Navy Department, Office of the Chief of Naval Operations, Naval History Division, Washington, D.C." hazegray.org. Retrieved 26 April 2023.
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