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I heard there were 3 ships in the Yamato class but I can't find any information about it. Some sources say it was a transport vessel to transfer spare airplane parts and ammo and some say it was a full aircraft carrier with a capacity of 85 planes and thousands of crew?

Can you please tell me the true purpose of this vessel?

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  • oh i looked on wikipedia but all i found was the information above – user50780 Sep 20 '18 at 20:08
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    Welcome to History:SE. Does the Wikipedia page on the Yamato-class battleship answer your questions? – sempaiscuba♦ Sep 20 '18 at 20:12
  • it does but when i saw it i thought i was reading about another aircraft carrier – user50780 Sep 20 '18 at 20:13
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    @user50780 - what aspect of your Question are you seeking a Bounty on? It seems sempaiscuba and user52638 answered your question (one in a comment above, and one in a formal Answer below), and indeed the latter's Answer was "accepted." What additional information are you seeking with the Bounty? – Kerry L Sep 24 '18 at 21:51
  • You should check out the book "Shinano" by Enright. It is a great book and quick read and goes over this very question. – ed.hank Sep 26 '18 at 15:17
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The 3rd ship of the Yamato class was Shinano, which was a large carrier sunk by the USS Archerfish (SS-311)

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  • Your link says the sub involved was the USS Archerfish, not the Swordfish. – justCal Sep 25 '18 at 0:33
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    Man, you could at least read an article you have posted. User justCal right - it was U.S. Navy submarine Archerfish – Dima Sep 25 '18 at 9:37
  • Actually, yes, it was Shinano ( 信濃 Shi-Na-No ). But it became abandoned ( it was originally an aircraft career ) because we were running out of budget and needed more planes than one big huge battleship. Actually it was Americans who carried back 7 of 46cm main batteries and looks like they were scrapped by you ( according to Japanese Wiki ). – Kentaro Oct 14 '18 at 0:01
  • Uhm I should have said It was **originally a battleship" destined to be the 3rd Yamato class battleship but was instead converted to an aircraft career. – Kentaro Oct 14 '18 at 0:10
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Shinano Japanese Carrier Shinano

Answer

According to the Wiki article:

Shinano (信濃), was an aircraft carrier built by the Imperial Japanese Navy (IJN) during World War II, the largest such built up to that time. Laid down in May 1940 as the third of the Yamato-class battleships, Shinano's partially complete hull was ordered to be converted to a carrier following Japan's disastrous loss of four fleet carriers at the Battle of Midway in mid-1942. Her conversion was still not finished in November 1944 when she was ordered to sail from the Yokosuka Naval Arsenal to Kure Naval Base to complete fitting out and transfer a load of 50 Yokosuka MXY7 Ohka rocket-propelled kamikaze flying bombs. Hastily dispatched, she had an inexperienced crew and serious design and construction flaws, lacked adequate pumps and fire-control systems, and did not carry a single aircraft. She was sunk en route, 10 days after commissioning, on 29 November 1944, by four torpedoes from the U.S. Navy submarine Archerfish. Over a thousand sailors and civilians were rescued and 1,435 were lost, including her captain. She remains the largest warship ever sunk by a submarine. [emphasis added]

So... Full carrier, which purpose was to replace fleet carrier losses suffered at Midway (not a mere transport, though was not completed and was only transporting arms when sunk, never any planes aboard) with over 2,400 officers, crew and laborers aboard when sunk.

Is there additional information you are seeking that is not found in the above cited Wiki article?

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  • And far from the first carrier based off a battleship hull... – Jon Custer Sep 25 '18 at 13:24
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1) Shinano was originally intended as a battleship. The English translation of "KOJINSHA No.6" states: "The 74th Imperial Conference convened on 26 December 1938 approved the building of 83 naval vessels included in the new program. In addition to two battleships (SHINANO and No. 111), the Fourth Replenishment Program authorized the construction of a new fleet carrier...." www.combinedfleet.com/kojinshavolume6.pdf

2) Shinano was then converted to an aircraft carrier. Many books contain claims like this:

"...Shinano, which was laid down as the third Yamato-class battleship in 1940 but was redesigned as an armoured carrier, the world's largest, after Midway. She was intended to carry few planes (up to fourty-seven) for her size but large stocks of fuel, munitions, and spares to replenish other carriers..."

as given in: The Pacific Campaign: World War II: the Us-Japanese Naval War, 1941-1945 by Daan Van Der Vat

However although this seems to be a frequent claim, I cannot find a book that actually cites an original source for such statements.

Some interesting discussion here: http://propnturret.com/tully/viewtopic.php?f=2&t=1256 seems to support the argument she was intended for a replenishment role, but also lacks original sources.

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