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No.1-class auxiliary minelayer
Photo: Imperial Japanese Navy · Wikimedia Commons · Public domain
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No.1-classauxiliaryminelayer

Mine Layers · Japan · 1941
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No.1-classauxiliaryminelayer

No.1-class auxiliary minelayer
No.1-class auxiliary minelayer Photo: Imperial Japanese Navy · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Mine Capacity
60
Laying Rate
55
Range
50
Concealment
40
Versatility
45
Reliability
70
Self-Defence
30
Endurance
55
Technology
40
Cost-Effectiveness
75
Origin Japan
ManufacturerUraga Dock Company
CategoryMine Layers
EraWorld War II
In service1941–1942
Quantity4
Data Quality84%
MASS(Military Archive Scoring System)
52
Mine Layers MASS Rating
4/9
World War II
15/37
All-Time
Mine Layers · 10 axes scored
Mine Capacity
60
Laying Rate
55
Range
50
Concealment
40
Versatility
45
Reliability
70
Self-Defence
30
Endurance
55
Technology
40
Cost-Effectiveness
75
ⓘ Regardless of era, the same scoring system applies to all units in the mine layers category.
01 / Overview
No.1-class auxiliary minelayer
Category
Country
Prime contractor
Production
1941–1942
Quantity
4
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
MINE LAYERS · WORLD WAR II
4
PERFORMANCE/PRICE
78
UNIT COST (2025 USD)
—
52
mine layers category
ⓘ Performance/Price and MASS score are computed across all units in the mine layers category, regardless of era.
02 / Specs & Design
◎Identification7MOD.7
  • Hull Classificationauxiliary minelayer
  • Ship Typeminelayer
  • BuilderUraga Dock Company
  • Commissioned1942
  • Ships in Class4
  • Roleminelaying
  • In ServiceYes
◈Displacement & Dimensions4MOD.4
  • Light Displacement215 t
  • Length35.11 m
  • Beam6.16 m
  • Draft2.38 m
▣Capacity2MOD.2
◇Propulsion5MOD.5
  • Propulsion Typediesel
  • Shaft Power400 kW
  • Top Speed9.5 kn
  • Range1,500
  • Complement (crew)63
◆Aviation4MOD.4
▤Self-Defense3MOD.3
⬢Fleet Status7MOD.7
  • Completed4
  • Under Construction0
  • Planned4
  • Cancelled0
  • Lost3
  • Retired1
  • Preserved0
▲Armour1MOD.1
  • Armour}}
03 / History
SERVICE LIFESPANRetired
  1. 1939First deployment: World War II
  2. 1941Production started
  3. 1942Production ended
85
years in service
1
years in production
4
units produced
📚 Sources
📖 ENCYCLOPEDIA Browse the Mine Layers entry →