The Sub Killer that Creeped Out Japan

Dark Seas • May 23, 2025

Dark Seas

About

Business Inquiries: [email protected] Join Dark Seas as we explore the world of naval warfare with cinematic short documentaries featuring the most powerful ships ever built, top-secret military projects, and classified missions. Including US, UK, Japanese and Soviet ships and battles from World War I, World War 2, the Korean War, the Vietnam War, the Cold War, and the Gulf War. As images and footage of actual events are not always available, Dark Seas sometimes utilizes similar historical images and footage for dramatic effect and soundtracks for emotional impact. We do our best to keep it as visually accurate as possible. All content on Dark Seas is researched, produced, and presented in historical context for educational purposes. We are history enthusiasts and are not always experts in some areas, so please don't hesitate to reach out to us with questions, corrections, additional information, or new ideas at [email protected].

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Video Description

In May 1944, a creepy silence descended across the Japanese Imperial Navy's communications network. One by one, Admiral Soemu Toyoda's carefully positioned submarines—his eyes and ears in the Pacific—fell quiet. First Ro-106. Then Ro-104 and Ro-116. Five submarines had vanished in less than a week, leaving RO-105 as one of Toyoda's last hopes for his plan of trapping the American fleet. As reports of the missing submarines reached Tokyo, Imperial headquarters dispatched urgent warnings to their remaining vessels. Something was happening that had never occurred before in naval history. A strange new weapon was on the loose, and a mysterious American ship was somehow doing this all on its own…