Summary and Key Points: Japan’s Taigei-class “Big Whale” submarines are portrayed as a generational step beyond the Soryu-class—heavier, quieter, and built around years of research to reduce noise, ...

Japan’s Taigei-Class Submarine: The Quiet Revolution Tokyo Needed Study a map and the logic writes itself. Japan sits astride the First Island Chain, the string of islands that can hem in China’s navy ...

JS Sogei, the sixth Taigei-class submarine, entered the water in a ceremony held at KHI’s shipyard in Kobe City, Japan, Oct. 14, 2025. Credit: Japan Acquisition, Technology & Logistics Agency Japan’s ...

The World War II submarine USS Lionfish was part of America's "Silent Service." Despite comprising less than 2% of all US Navy vessels during World War II, submarines like the USS Lionfish sank 55% of ...

JS Sogei, the sixth Taigei-class submarine, entered the water in a ceremony held at KHI’s shipyard in Kobe City, Japan, Oct. 14, 2025. The Taigei class are Japan’s newest diesel-electric submarines.

Japan now operates five cutting-edge Taigei-class submarines, in addition to its 12 Soryu-class and 6 Oyashio-class vessels. The Japan Maritime Self-Defense Force (JMSDF) commissioned its fifth Taigei ...

JS Chogei , the fifth of eight Taigei-class submarines that have either been commissioned, contracted, or approved for acquisition. (ATLA) Japan has commissioned its fifth Taigei-class diesel‑electric ...