OVERVIEW: The SS 511 *Oryu* [Soryu Class] is a diesel-electric attack submarine (SSK) in service with the Japan Maritime Self-Defense Force (JMSDF).

DETAILS: The *Soryu* class represents a significant advancement in Japanese submarine design, building upon the earlier *Oyashio* class. The *Oryu*, commissioned in 2020, is part of the later batches of the *Soryu* class and incorporates further improvements, including the adoption of lithium-ion batteries for enhanced underwater endurance and performance. The design philosophy behind the *Soryu* class emphasizes stealth, long-range underwater operations, and advanced sensor capabilities to maintain a strategic advantage in the challenging underwater environment of the Pacific. The class also benefits from improved automation and crew comfort compared to previous generations, contributing to enhanced operational effectiveness during extended deployments.

The *Oryu*'s primary role is anti-submarine warfare (ASW), protecting vital sea lanes and projecting power in the region. The submarine also possesses anti-surface warfare (ASuW) capabilities, allowing it to engage enemy surface combatants. The *Oryu* contributes significantly to the JMSDF's maritime domain awareness through covert intelligence gathering and surveillance operations. The integration of advanced acoustic sensors, combined with the submarine’s inherent stealth, allows it to effectively track and monitor potential adversaries. These capabilities contribute to the overall security of Japan and its surrounding waters.

The *Oryu* is equipped with an extensive suite of advanced sensors. The J/ZQQ-7 bow-mounted sonar provides long-range detection and tracking of underwater contacts. Flank arrays enhance situational awareness by detecting targets at greater ranges and reducing blind spots. The J/ZQQ-7 TASS (Towed Array Sonar System) further expands the submarine's detection range and is particularly effective against quiet submarines. The J/ZPS-6F radar provides surface search and navigation capabilities. The J/ZLR-7 electronic support measures (ESM) system is used for detecting and identifying radar emissions from other ships and aircraft. An Generic Acoustic Intercept system further enhances the vessel's SIGINT capabilities. The CM010 Photonics Mast replaces the traditional periscope, offering improved image processing, low-light performance, and reduced detectability. Offensive capabilities are centered on six 533mm torpedo tubes, capable of launching a variety of torpedoes. The presence of a MOD Launcher suggests the capability to deploy mines or special forces teams. A Signal Ejector allows for secure communication with other units.

SPECIFICATION: Length: 84.0 m || Beam: 9.1 m || Draft: 8.5 m || Disp: 2900 t

SENSORS: J/ZLR-7 || Generic Acoustic Intercept || J/ZPS-6F || J/ZQQ-7 Bow || J/ZQQ-7 Flank Array || J/ZQQ-7 TASS || CM010 Photonics Mast

ARMAMENT: 533mm TT || MOD Launcher || Signal Ejector