Credit
JO2 Ryan C. McGinley, USN · Public domain · Resized · Public domain · Source ↗ · Modified
FORCETALLY
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At a glance
Oyashio-class submarinelarger figure on 2 of 2
Shallow Water Combat Submersiblelarger figure on 0 of 2
Measured figures
Length
Single source81.7 m (268 ft 1 in )[source]
Length
Single sourceConfiguration
| Specification | Oyashio-class submarine | Shallow Water Combat Submersible |
|---|---|---|
| Power | Diesel-electric 2 Kawasaki 12V25S diesel engines 2 Kawasaki alternators 2 Toshiba motors 3,400 hp (2,500 kW) surfaced 7,750 hp (5,780 kW) submerged[source] | — |
| Name | Oyashio (おやしお, Oyashio Current )[source] | — |
| Builders | Kawasaki Shipbuilding Corporation Mitsubishi Heavy Industries[source] | Teledyne Brown Engineering[source] |
| Operators | Japan Maritime Self-Defense Force[source] | United States Navy Royal Navy (planned)[source] |
Counts only measures both sources give with the same scope. A larger figure is not a better system.
6.8 meters (22 ft)[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
| Preceded by | Harushio class[source] | SEAL Delivery Vehicle[source] |
|---|
| Succeeded by | Sōryū class[source] | — |
|---|
| Built | 1994–2008[source] | — |
|---|
| In commission | 1998–present[source] | — |
|---|
| Planned | 11[source] | — |
|---|
| Completed | 11[source] |
|---|
| Active | 8 (2 converted to training ships)[source] | — |
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| Retired | — |
|---|
| Type | Attack submarine[source] | Submersible , diver propulsion vehicle[source] |
|---|
| Sensors & processing systems | Sonar : Hughes/Oki ZQQ-6 hull-mounted sonar, flank arrays, 1 towed array Radar : JRC ZPS 6 I-band search radar.[source] | Inertial navigation system , high-frequency sonar for obstacle/mine avoidance and navigation, GPS[source] |
|---|
| Armament | 6 × HU-605 21 in (533 mm) torpedo tubes with 20 reloads for: Type 89 torpedoes UGM-84 Harpoon missiles[source] | SEAL team personal weapons, limpet mines[source] |
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| Country of origin | Japan[source] | United States[source]Inventory Origin column; table 2, row 5, cell 2; revision 1373375989; retrieved 2026-09-30 |
|---|
| Cost | — | $383 million (program cost)[source] |
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| On order | — | 7 USN, 3 RN[source] |
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| Building | — |
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| Propulsion | — | Lithium-ion batteries powering electric motors[source] |
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| Test depth | — | >190 feet (58 m)[source] |
|---|