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4. Soryu-class

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Japan’s Soryu-class submarines lead in conventional submarine technology. These diesel-electric subs use air-independent propulsion, letting them stay submerged for long periods. Their X-shaped stern boosts maneuverability, while advanced acoustic tiles and a special snorkel lower detectability. The Soryu-class carries Type 89 torpedoes and Harpoon missiles, making it a serious threat to opponents.