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I-121-class submarine
Photo: published by 海軍協会 (The Navy Association of Japan) · Wikimedia Commons · Public domain
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I-121-classsubmarine

Conventional Submarines · Japan · 1926
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I-121-classsubmarine

I-121-class submarine
I-121-class submarine Photo: published by 海軍協会 (The Navy Association of Japan) · Wikimedia Commons · Public domain
Origin Japan
ManufacturerKawasaki Heavy Industries Ship & Offshore Structure Company
CategoryConventional Submarines
EraInterwar Period
In service1926–1928
Operators1 countries
Quantity4
Data Quality86%
01 / Overview
I-121-class submarine
Country
Production
1926–1928
Quantity
4
Operators
Conflicts
02 / Specs & Design
◎Identification6MOD.6
  • Hull ClassificationMinelaying submarine
  • Submarine Typeminelayer
  • Builder / ShipyardKawasaki Shipbuilding Corporation
  • Commissioned1927
  • Boats in Class4
  • In ServiceYes
◈Displacement5MOD.5
  • Surfaced Displacement1,142 t
  • Submerged Displacement1,768 t
  • Length85.2 m
  • Beam7.52 m
  • Draft4.42 m
▣Propulsion7MOD.7
◇Diving & Endurance2MOD.2
  • Test Depth75 m
  • Complement (crew)51
◆Armament6MOD.6
▤Production & Cost2MOD.2
  • First of Class1924
  • Operators1
⬢Fleet Status7MOD.7
  • Completed4
  • Under Construction0
  • Planned6
  • Cancelled2
  • Lost3
  • Retired1
  • Preserved0
03 / History
SERVICE LIFESPANStill in Service
  1. 1926Production started
  2. 1928Production ended
  3. 1937First deployment: Second Sino-Japanese War
100
years in service
2
years in production
4
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Conflicts
I-121-CLASS SUBMARINE · CONFLICTS SERVED IN0% win
Total Conflicts
1
Victories
0
Ongoing
0
Losses
0
ⓘ Shown only from conflicts recorded in our database.
05 / Operators
Operator Inventory1country · 2units
2active
06 / MASS Score
Not enough weapon data to rank this category.
📖 TERMS ON THIS PAGE3terms
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.
Laying explosive mines underwater from a submarine.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Conventional Submarines entry →