Oyashio-Class Attack Submarines
Advanced Conventional Submarines - Oyashio-class are refined conventional attack submarines. 11 boats commissioned 1998-2008. Last large pre-AIP class for JMSDF. Tear-drop hull design (optimized hydrodynamics). 4,000 tons submerged, 269 ft long. Diesel-electric (no AIP - predates Soryu). 6 torpedo tubes, 20 weapons (Type 89 torpedoes, Harpoon missiles). Advanced for era: Anechoic coating, improved sonar (ZQQ-5B, ZQQ-6), quiet machinery. 350-meter test depth. 20 knots submerged. Crew 70. Bridge between earlier Harushio and advanced Soryu (AIP/Li-ion). Some retired as Taigei replaces them, most still active as of 2025. Proven design serving 15-25+ years. Represented Japanese conventional submarine excellence before AIP revolution.
Specifications
- Displacement (std)
- 2750 t
- Displacement (full)
- 4000 t
- Length
- 268 ft
- Beam
- 29.2 ft
- Crew
- 70
- Ships built
- 11
- Commissioned
- 1998-2008
- Decommissioned
- Some retired, most active (as of 2025)
Performance
- Top speed
- 12 kn
- Range
- 6500 nm surfaced at 6.5 knots
Armament
- Main guns
- None (submarine)
- Secondary guns
- None
- Torpedoes
- 6× 533mm (21-inch) - bow
Armor & Systems
- Belt
- None
In-Game
- Tier
- T10
- Game power
- 694.45
- Research cost
- 1,527,790
- Credit cost
- 486,115
Notable
- Refined tear-drop hull design (1998-2008)
- Improved over Harushio (larger, quieter)
- 11 boats built (last large pre-AIP class)
- Advanced anechoic coating
- Improved sonar (ZQQ-5B/ZQQ-6)
- 20 weapons capacity
- Quieter machinery (vibration isolation)
- Bridge between old and new (pre-AIP, but very capable)
- Some upgraded, some retired as of 2025