Historium

Documentary

Shinano’s First and Final Voyage

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Documentary

Description

Shinano began as a Yamato-class battleship project before Japan converted the hull into an aircraft carrier. The result was an exceptionally large ship, but size concealed serious vulnerabilities when it left Yokosuka in November 1944. Work remained incomplete, and the crew had limited experience operating the vessel together.

During the transfer toward Kure, USS Archerfish intercepted Shinano and struck it with torpedoes. Progressive flooding and weaknesses in damage control proved disastrous. The carrier sank before it could enter an operational combat career, making its loss a sharp example of the difference between launching a ship and having one ready for war.

This documentary follows the conversion, the voyage and the submarine encounter. Naval records explain the role of watertight integrity, internal organization and decisions made after the attack. They also prevent Shinano’s story from becoming a simple claim that a single torpedo could sink any supposedly invulnerable giant.

Sources and further reading: H-039-1: Carrier Shinano Sunk by USS Archerfish, 29 November 1944

Archerfish I (SS-311)

The Yokosuka-built Aircraft Carrier Shinano

Historium research desk

Historical context

The Shinano dossier combines Historium’s documentary, detailed article, and original music around one maritime story. It connects the ship’s design and wartime role with the circumstances of its first voyage, while keeping the film and written research independently accessible.

Documentary

Transcript

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English (source subtitles)

This transcript follows the video’s narration. The companion article provides dated sources, historical context and editorial corrections.

0:00 Hours into her maiden voyage, the largest aircraft carrier the world
0:04 had ever seen was sent to the bottom of the ocean
0:07 by a single American submarine, claiming 1,435 lives.
0:14 Shinano was originally designed as a sister ship to the legendary
0:17 Yamato, another Japanese titan sunk on a suicide mission with
0:23 3,000 crew aboard.
0:25 But in World War II, the era of battleship duels had
0:28 ended, replaced by airstrikes and aircraft carriers.
0:33 In a desperate pivot, the Japanese converted Shinano into a carrier.
0:37 Weighing a staggering 72,000 tons and deemed unsinkable by her
0:43 creators, this fortress possessed the heaviest armor in naval history.
0:48 Yet, Shinano wasn't ready.
0:51 With Yokosuka under relentless Allied bombardment, she was forced to flee
0:55 secretly toward Kure in November 1944.
0:59 Lacking crucial watertight compartments and manned by an untrained crew, this
1:05 floating behemoth crossed paths with a lone hunter just hours into
1:10 her journey, the American submarine USS Archerfish.
1:14 Peering through his periscope, the American captain couldn't believe his eyes.
1:19 A massive ghost ship, completely absent from intelligence reports, loomed directly
1:24 in front of him.
1:26 Six torpedoes were unleashed.
1:28 Four found their mark.
1:30 Just seven hours after being hit, the Colossus capsized, dragging over
1:35 1,400 sailors into the dark depths of the Pacific.
1:40 One of the final hopes of the Japanese Empire, this engineering
1:44 marvel sank without ever seeing a single day of combat, becoming
1:48 the ultimate tragic symbol of a collapsing empire.

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