Key Points - Japan is bolstering its undersea capabilities against regional threats from China with its new Taigei-class "Big Whale" diesel-electric attack submarines. -The fourth boat in the class, ...
Japan's Taigei-class submarine—the "Big Whale"—is the first submarine class designed entirely around lithium-ion batteries, abandoning traditional Air-Independent Propulsion altogether. At just $700 ...
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 ...
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