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After total loss was narrowly avoided in the battle in the Pacific Ocean in 1944, the Japanese Navy took a torpedo station in the Seto Inland Sea and converted it into a training facility for a suicide-squad of manned torpedos.
Undergoing hard physical and psychological drills, the young volunteer soldiers, mostly under 25, were prepared to be locked into a 8-meter torpedo and launch themselves into the enemy fleet. In the end, “the most effective” weapon against the American Navy accounted for only two officially documented vessels sunk — in stark contrast to their own numerous losses in the field and in training accidents. In fateful irony, the head developer of the program himself died while doing a test routine.
After the war ended in August 1945, a former soldier gathered memories of his colleagues like photographs, drawings, and goodbye letters — some of them written in blood. To keep them from being destroyed by the occupation forces, he temporarily buried this collection in a secret location. Later, the collection was added to with more private objects from the bereaved families and interviews of surviving soldiers.
The Kaiten training facility was officially turned into a museum in 1968 and serves as testimony of the unsettling cruelty of fanaticism.
Know Before You Go
The museum is on the island of Ohzushima, about 30 to 40 min by ferry from Shunan City. The ferry terminal is just a 5min walk from Tokuyama Shinkansen Station. Buy the ferry tickets at the vending machine inside the ferry terminal before getting on the boat.
Make sure to bring a little snack with you, as there are no food options around the museum. From the museum, you can take a small hike up the hill to an uninspiring monument with a breathtaking view over the Seto Inland Sea.
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December 19, 2025