**OVERVIEW:** The SS 583 *Harushio* is a submarine operated by the Japan Maritime Self-Defense Force (JMSDF). Commissioned in 2018, this submarine represents a modern iteration of Japanese submarine design, likely intended to enhance the JMSDF’s underwater warfare capabilities in the Asia-Pacific region.

**DETAILS:**

The *Harushio* likely represents a continuation of Japanese submarine design principles focused on acoustic stealth, advanced sensor integration, and potent anti-ship warfare capabilities. It likely incorporates advancements in hull design for reduced hydrodynamic noise, improved battery technology for extended submerged endurance, and a sophisticated combat management system for integrating sensor data and weapon control. Given Japan's strong industrial base and technological prowess, it is likely that the *Harushio* incorporates a high degree of domestically produced equipment and technologies. The designation 'SS' implies a diesel-electric propulsion system with possible auxiliary power systems for increased underwater endurance, possibly including air-independent propulsion (AIP).

The primary roles of the *Harushio* are likely anti-submarine warfare (ASW), anti-surface warfare (ASuW), and intelligence, surveillance, and reconnaissance (ISR) operations. Equipped with a comprehensive suite of sensors, the submarine is capable of long-range detection and tracking of both surface and subsurface targets. The 533mm torpedo tubes allow for the deployment of advanced torpedoes and potentially anti-ship missiles, enabling the vessel to engage a wide range of targets. Its role in ISR is augmented by the inclusion of both optical and low-light television (LLTV) periscopes.

The *Harushio's* sensor suite is particularly noteworthy. The J/ZQR-1 sonar, believed to be a variant of the AN/BQR-15A, provides passive detection and tracking capabilities, crucial for ASW operations. The J/ZQQ-5B bow sonar array allows for active and passive detection, enhancing situational awareness. The inclusion of the J/ZQQ-5B flank array further increases detection range and bearing accuracy. The J/ZPS-6 radar allows for surface detection and navigation. The Generic Acoustic Intercept system offers electronic support measures (ESM) functionality, allowing the submarine to detect and analyze enemy radar and communication signals. The J/ZLR-3 radar warning receiver enhances self-defense capabilities.

**SPECIFICATION:** Length: 77.0 m || Beam: 10.0 m || Draft: 7.7 m || Disp: 2450 t

**SENSORS:** J/ZQR-1 [AN/BQR-15A] || J/ZQQ-5B Bow || J/ZPS-6 || J/ZLR-3 || J/ZQQ-5B Flank Array || Generic Acoustic Intercept || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

**ARMAMENT:** Signal Ejector || 533mm TT