A secret super battleship falls, and its wreck reveals why.
Relive the Battle of Leyte Gulf through the rise, destruction, and rediscovery of Musashi, once the largest battleship ever built. Using wartime records, survivor testimony, and deep-sea exploration, this film examines how an allegedly unsinkable warship was sent to the ocean floor. Sign up to uncover the evidence, the mystery, and the human cost behind its final hours.
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Frequently asked questions
Yes. Every plan unlocks the full library — including all Curiosity Originals like Unsinkable: Japan’s Lost Battleship — in up to 4K, ad-free, on all your devices.
Unsinkable: Japan’s Lost Battleship is a Curiosity Original, exclusive to Curiosity Stream.
Watch on the web, iOS and Android, Roku, Apple TV, Amazon Fire TV, Chromecast, Android TV, and most smart TVs. Start on one device and pick up right where you left off on another.
Curiosity Stream is our streaming service — thousands of documentaries and originals. The Smart Bundle is Curiosity Stream plus four other independent streaming services (Tastemade, Kidstream, Curiosity University, and SOMM TV) on a single subscription.