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I-400-classsubmarine

Conventional Submarines · Japan · 1944
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I-400-classsubmarine

I-400-class submarine
I-400-class submarine Photo: Wikimedia Commons · Public domain
Origin Japan
CategoryConventional Submarines
EraWorld War II
In service1944–1945
Operators2 countries
Quantity3
Data Quality86%
01 / Overview
I-400-class submarine
Country
Production
1944–1945
Quantity
3
Unit Price (current)
$2.3M↗ 1875% inflation · 1942→2025
Original Price
$115.0K (1942)
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
CONVENTIONAL SUBMARINES · WORLD WAR II
—
PERFORMANCE/PRICE
—
UNIT COST (2025 USD)
$2.3M
Original: $115.0K (1942)
Inflation: +%1875
—
conventional submarines category
ⓘ Performance/Price and MASS score are computed across all units in the conventional submarines category, regardless of era.
02 / Specs & Design
◎Identification6MOD.6
  • Hull ClassificationSubmarine aircraft carrier
  • Submarine TypeSubmarine aircraft carrier
  • Laid Down1943
  • Commissioned1944
  • Boats in Class3
  • In ServiceYes
◈Displacement4MOD.4
  • Surfaced Displacement5,900 t
  • Length122 m
  • Beam12 m
  • Draft7 m
▣Propulsion7MOD.7
◇Diving & Endurance2MOD.2
  • Test Depth100 m
  • Complement (crew)144
◆Armament6MOD.6
▤Production & Cost2MOD.2
  • First of Class1944
  • Operators1
⬢Fleet Status4MOD.4
  • Completed3
  • Planned18
  • Cancelled15
  • Retired3
03 / History
SERVICE LIFESPANStill in Service
  1. 1939First deployment: World War II
  2. 1944Production started
  3. 1945Production ended
82
years in service
1
years in production
3
units produced
1
countries operating
ⓘ The producing country still actively operates it. 1 countries retired it.
04 / Operators
Operator Inventory1country · 3units
3active
05 / MASS Score
Not enough weapon data to rank this category.
MASS RANKINGSMASS ↗
ⓘ Rankings are within theConventional Submarinescategory.
📖 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 Conventional Submarines entry →