"Ship classes" refers to the common practice of building multiple ships using a same or similar design. The design is then called a "class", and the class is often named after its 1st built or commissioned ship, or the initial design's code name. Ships built under the same class are then called "sister ships".

In Kancolle, several "classes" are instead referred to by their "type" (e.g. the Number 2-class is referred to as the Type D Kaiboukan).
Some informal classes are also sometimes used, such as the "Special Type Destroyers", or the ones listed bellow.

Ship Classes

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(F)BB(V)

CV(B/L)

CA(V)

CL(T)/CT

DD

DE

SS(V)

Aux

Class Changes

The following is a list of cases where the class of a ship changes upon remodeling.

This change can have an impact on mechanics asking for a specific class, such as Quests.
This can also affect the impacted ship's card, looking as if they were not remodeled, despite being already remodeled (see here).

Base Classes	Ships		Remodeled Classes	Ships
Kasuga Maru-class	Kasuga Maru	[math]\displaystyle{ \rightarrow }[/math]	Taiyou-class	Taiyou
Kasuga Maru-class	Yawata Maru		Taiyou-class	Unyou
Taigei-class	Taigei		Ryuuhou-class	Ryuuhou
Type IXC U-boat	U-511 Kai		Ro-series Submarine	Ro-500

Library Only Classes

The following is a list of cases where the class displayed in the game Library of a ship is different from the real ship's class.

None of those cases has any gameplay effect.
Those cases are purely cosmetic, often reflecting IRL concepts, or being fully made-up.

Library Only Classes	Ships
Kai Yamato-class	Yamato Kai Ni, Yamato Kai Ni Juu
Kai Ise-class	Ise Kai Ni, Hyuuga Kai Ni
Kai Kongou-class	Kongou Kai Ni C, Hiei Kai Ni C, Haruna Kai Ni B, Haruna Kai Ni C, Kirishima Kai Ni C
Kai Richelieu-class	Richelieu Deux
Kai Akagi-class	Akagi Kai Ni, Akagi Kai Ni E
Kai Kaga-class	Kaga Kai Ni, Kaga Kai Ni E,
Kai Houshou-class	Houshou Kai Ni, Houshou Kai Ni Sen
Kai Ryuuhou-class	Ryuuhou Kai Ni, Ryuuhou Kai Ni E
Special Purpose Aircraft Carrier	Yawata Maru
Kai Agano-class	Noshiro Kai Ni, Yahagi Kai Ni, Yahagi Kai Ni B
Remodeled Kuma-class	Kuma Kai Ni, Kuma Kai Ni D
Kai Shiratsuyu-class	Umikaze Kai Ni^[1], Yamakaze Kai Ni^[1], Yamakaze Kai Ni D^[1]
Remodeled Shiratsuyu-class	Shigure Kai San, Harusame Kai Ni
Kai Kagerou-class	Yukikaze Kai Ni
Remodeled Kagerou-class	Dan Yang, Amatsukaze Kai Ni
Kai Yuugumo-class	Hayashimo Kai Ni, Fujinami Kai Ni, Kiyoshimo Kai Ni, Kiyoshimo Kai Ni D
Kai Akizuki-class	Hatsuzuki Kai Ni
Kai Fletcher-class	Fletcher Mk.II
Kai Ukuru-class	Inagi Kai Ni
LL01	Souya (AGL)
PL107	Souya (AGB)

↑ ^{Jump up to: 1.0} ^1.1 ^1.2 Have its class number changed too

Additionally, Dan Yang's type is further described as a "Yang Zi-class Destroyer".

Equipment Classes

Some equipment in the game are simply treated as "ship girl's gears" and not as naval vessels proper. They are:

Daihatsu-class landing craft (and derivatives),
Toku Daihatsu-class landing craft (and derivatives),
Soukoutei-class armored boat,
Minisub Type A Kō-hyōteki-class midget submarine,
Minisub Type C Kō-hyōteki-class midget submarine,
Minisub Type D Kō-hyōteki-class midget submarine (Kouryuu).

Ship Class

Ship Classes

Kasuga Maru-class (Nitta Maru-class)

Perth-class (Amphion-class)