Kaidai-type submarine

Class overview
NameKaidai-type submarine
Builders
Operators Imperial Japanese Navy
Subclasses
  • Kaidai I (I-51-class)
  • Kaidai II (I-152-class)
  • Kaidai IIIa (I-153-class)
  • Kaidai IIIb (I-156-class)
  • Kaidai IV (I-61/I-162-class)
  • Kaidai V (I-165-class)
  • Kaidai VIa (I-168-class)
  • Kaidai VIb (I-174-class)
  • Kaidai VII (I-176-class)
Built1921–1943
In commission1924–1945

The Kaidai-type submarine (海大型潜水艦, Kaidai-gata sensuikan) was a type of first-class submarine operated by the Imperial Japanese Navy (IJN) before and during World War II. The type name was shortened to Kaigun-shiki Ōgata Sensuikan (海軍式大型潜水艦) Navy Large Type Submarine.[1]

All Kaidai-class submarines originally had a two-digit boat name, from I-51 onwards. On 20 May 1942, all Kaidai submarines added a '1' to their names. For example, I-52 became I-152. Ships are listed by the three-digit boat name if they had one, two-digit if they were not granted one or left service before 20 May 1942.

  1. ^ The 海大 read as Kai-Dai, but the 大型 read as Ō-gata in Japanese.