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Kairyu-class submarine
Photo: U.S. Naval Historical Center Photograph. · Wikimedia Commons · Public domain
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Kairyu-classsubmarine

Midget / Coastal Submarines · Japan · 1943
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Kairyu-classsubmarine

Kairyu-class submarine
Kairyu-class submarine Photo: U.S. Naval Historical Center Photograph. · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Stealth
60
Compactness
85
Special-Ops Capability
50
Littoral Suitability
80
Sensors
40
Endurance
30
Firepower
55
Survivability
45
Technology
35
Cost-Effectiveness
70
Origin Japan
CategoryMidget / Coastal Submarines
EraWorld War II
In service1943–1945
Operators1 countries
Quantity200
Data Quality85%
57
Midget / Coastal Submarines MASS Rating
6/18
World War II
19/50
All-Time
Midget / Coastal Submarines · 10 axes scored
Stealth
60
Compactness
85
Special-Ops Capability
50
Littoral Suitability
80
Sensors
40
Endurance
30
Firepower
55
Survivability
45
Technology
35
Cost-Effectiveness
70
ⓘ Regardless of era, the same scoring system applies to all units in the midget / coastal submarines category.
01 / Overview
Kairyu-class submarine
Country
Production
1943–1945
Quantity
200
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
MIDGET / COASTAL SUBMARINES · WORLD WAR II
6
PERFORMANCE/PRICE
35
UNIT COST (2025 USD)
—
57
midget / coastal submarines category
ⓘ Performance/Price and MASS score are computed across all units in the midget / coastal submarines category, regardless of era.
02 / Specs & Design
◎Identification7MOD.7
  • Hull Classificationmidget submarine
  • Submarine Typesuicide midget submarine
  • Builder / ShipyardYokosuka Naval Arsenal
  • Laid Down1943
  • Commissioned1943
  • Boats in Class200
  • In ServiceNo
◈Displacement & Dimensions3MOD.3
  • Surfaced Displacement19.3 t
  • Length17.2 m
  • Beam1.3 m
▣Propulsion7MOD.7
◇Diving & Endurance1MOD.1
  • Complement (crew)2
◆Armament7MOD.7
▤Sensors1MOD.1
  • Combat Systemmanual controls, periscope, compass
▲Production2MOD.2
  • First of Class1945
  • Operators1
◎Fleet Status5MOD.5
  • Completed200
  • Active0
  • Under Construction0
  • Planned760
  • Preserved2
03 / History
SERVICE LIFESPANStill in Service
  1. 1939First deployment: World War II
  2. 1943Production started
  3. 1945Entered service
83
years in service
2
years in production
200
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Countries1country
📖 TERMS ON THIS PAGE2terms
Anti-ship missiles are guided missiles designed to engage and destroy naval vessels. They are typically used by aircraft, ships, or submarines to attack enemy ships.
Propulsion system combining diesel engines to generate electricity, which powers electric motors driving the vessel's propellers.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Midget / Coastal Submarines entry →