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

Mine Countermeasures Vessels (MCM) · Japan · 1941
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No.1-classauxiliaryminesweeper

No.1-class auxiliary minesweeper
No.1-class auxiliary minesweeper Photo: Imperial Japanese Navy · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Mine-Hunting Effectiveness
30
Sonar & Sensors
20
Low Signature
10
Clearance Rate
40
UUV Integration
0
Endurance
50
Reliability
70
Survivability
30
Technology
10
Cost-Effectiveness
80
Origin Japan
ManufacturerKanadevia Corporation
CategoryMine Countermeasures Vessels (MCM)
EraWorld War II
In service1941–1943
Operators3 countries
Quantity22
Data Quality88%
30
Mine Countermeasures Vessels (MCM) MASS Rating
15/20
World War II
142/173
All-Time
Mine Countermeasures Vessels (MCM) · 10 axes scored
Mine-Hunting Effectiveness
30
Sonar & Sensors
20
Low Signature
10
Clearance Rate
40
UUV Integration
0
Endurance
50
Reliability
70
Survivability
30
Technology
10
Cost-Effectiveness
80
ⓘ Regardless of era, the same scoring system applies to all units in the mine countermeasures vessels (mcm) category.
01 / Overview
No.1-class auxiliary minesweeper
Country
Prime contractor
Production
1941–1943
Quantity
22
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
MINE COUNTERMEASURES VESSELS (MCM) · WORLD WAR II
15
PERFORMANCE/PRICE
94
UNIT COST (2025 USD)
—
30
mine countermeasures vessels (mcm) category
ⓘ Performance/Price and MASS score are computed across all units in the mine countermeasures vessels (mcm) category, regardless of era.
02 / Specs & Design
◎Identification4MOD.4
  • Ship TypeMinesweeper
  • Commissioned1942
  • Ships in Class22
  • In ServiceYes
◈Displacement & Dimensions4MOD.4
  • Light Displacement215 t
  • Length33 m
  • Beam5.92 m
  • Draft2.29 m
▣Propulsion4MOD.4
  • Propulsion Type*1 × Akasaka Model diesel *single shaft, 300 bhp
  • Top Speed9.5 kn
  • Range1,500
  • Complement (crew)43
◇Self-Defense1MOD.1
  • Main Gun76.2 mm L/23.5 AA gun
◆Fleet Status3MOD.3
  • Completed22
  • Lost7
  • Retired15
▤Armour1MOD.1
  • Armour}}
03 / History
SERVICE LIFESPANStill in Service
  1. 1939First deployment: World War II
  2. 1941Production started
  3. 1943Production ended
85
years in service
2
years in production
22
units produced
1
countries operating
ⓘ The producing country still actively operates it. 2 countries retired it.
04 / Operators
Operator Countries3country
📚 Sources
📖 ENCYCLOPEDIA Browse the Mine Countermeasures Vessels (MCM) entry →