The armored Japanese carrier designed to survive, but destroyed by its own design

Countries & Cities · Published 12 October 2026 Swipe more like this →

In short: Taihō was meant to be a revolution in naval warfare. As the first Japanese carrier with an armored flight deck, she was built to endure heavy bombardment and continue fighting. Yet, a single torpedo hit triggered a catastrophic chain reaction that proved her advanced engineering was her ultimate undoing.

Commissioned on 7 March 1944, Taihō represented a major shift in Imperial Japanese Navy doctrine. Unlike previous carriers, her design featured a heavy belt armor and a steel flight deck—specifically a 75–80 mm thick protective lid—intended to withstand multiple 500 kg bomb hits. To save weight and cost, her deck was covered in a 6 mm thick latex coating rather than traditional wood, though this material was prone to becoming brittle and cracking over time.

However, the ship's sophisticated protection came with a fatal trade-off. The heavy armor required to protect the ship's magazines and machinery caused the hull to sit much deeper in the water. This meant the bottoms of her two elevator wells, which served as the roofs for her aviation fuel tanks, were actually submerged below the waterline. Furthermore, designers had prioritized protecting the ship's bomb and torpedo magazines over the aviation fuel tanks, leaving the latter only partially armored.

This vulnerability proved fatal during the Battle of the Philippine Sea on 19 June 1944. After being struck by a single torpedo from the American submarine USS Albacore, the ship suffered from poor damage control and explosions. The empty air spaces around the partially protected fuel tanks acted as a death trap. This failure was so significant that subsequent Japanese carriers were built with these spaces filled with concrete to mitigate the risk of shock damage and splinters.

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