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Category:Coastal Defense Ships

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This category contains all ships classified as Coastal Defense Ships.

This category is populated by Template:KanmusuInfo. Please do not manually add pages to this category.

In Kancolle, "Coastal Defense Ships" are labeled as "DE", whereas in real life, DE designates "Destroyer Escort".


Coastal Defense Ships (DE) are weak ships with high ASW Anti-Submarine Warfare stat, utilizing Depth ChargesSONAR ASW equipment. They:

DE Default equipment compatibility
✔️ Can Equip ❌ Cannot Equip
Fighter Dive Bomber Torpedo Bomber JetFighterBomber2.png Reconnaissance Aircraft Large Reconnaissance AircraftSp Reconnaissance SeaplaneRecon Seaplane BomberBomber Seaplane Fighter Large Flying Boat Rotorcraft Liaison Aircraft Aviation Personnel TransportationMaterial.png
Small Caliber Main Gun Anti-Aircraft Gun Anti-Aircraft Fire Director Depth Charges Small SONARSmall Small RADARSmall Medium Caliber Main Gun Large Caliber Main Gun Very Large Caliber Main GunSp Secondary Gun Large Secondary High-Angle GunSp_Sec Torpedoes Submarine TorpedoesSub Midget SubmarineMinisub Large SONARLarge Large RADARLarge Very Large RADARSp Submarine Equipment
Lookout Anti-Ground Artillery Smoke Generator Emergency Repair Personnel Ration Anti-Aircraft Shell Armor-Piercing Shell Engine Improvement Medium ArmorMedium Large ArmorLarge FlareIcon.png Searchlight Large SearchlightLarge Drum Landing Craft Amphibious Tank Landing Forces Facility.png Command Facility Supplies
RE: Anti-Aircraft Gun Anti-Aircraft Fire Director Lookout Emergency Repair Personnel Ration Equipment Card Type 95 Depth Charge.png Equipment Card Type 2 Depth Charge.png Equipment Card Type 2 Depth Charge Kai 2.png
Equipability notes: Night Fighter=Fighter ; Night Torpedo Bomber=Torpedo Bomber ; JetFighterBomber1.png=JetFighterBomber2.png ; Night Reconnaissance Seaplane =Reconnaissance SeaplaneRecon ; Night Seaplane Bomber =Seaplane BomberBomber ; Small Caliber Main High-Angle GunSmall=Small Caliber Main Gun ; Medium Main High-Angle GunMedium=Medium Caliber Main Gun ; Secondary High-Angle GunSec=Secondary Gun ; Barrage Balloon=Smoke Generator


Developed originally as fishery protection ships, with a secondary minesweeping and tertiary convoy escort wartime function, the Shimushu class coastal defense ships (Kaibōkan) became during the war the template for the main type of oceanic convoy escorts built by the IJN. These ships were initially conceived in the early 1930s, a resurgent Russian naval presence in the Far East resulted in a number of incidents involving Japanese fisheries in disputed waters, they were consistent with the unlimited category (Article 8) of the London Naval Treaty of 1930 that allowed to build ships like the British sloops, French avisos, and the American Erie class patrol gunboats, but they were effectively authorized and built only with the 1937 naval program, after Japan had left the Treaty system and the Second London Naval Treaty had removed those quantitative limitations that justified the introduction of an unlimited category.

Originally coastal defense ship was a classification used for obsolete battleships and cruisers deemed unfit for first-line duties and assigned to coastal defense, it became a separate classification that included only the new escorts in July 1942, the surviving obsolete armored cruisers were reclassified as heavy cruisers; the new classification was also moved from the Gunkan sub-group, which included main combatants like battleships, cruisers, carriers, etc. to the baseline Kantei group, which included destroyers, submarines, torpedo boats, etc.

The lack of an ASW emphasis in the Shimushu class can be evidenced from the limited depth charge stowage (12, increased to 24 since May 1942 and 60 since Autumn 1943) and the lack of sonar until Autumn 1942, coastal defense ships became genuine, purpose-built, convoy escorts only with the Mikura class, that was fitted with sonar since the beginning and carried 120 depth charges, albeit the minesweeping gear was dropped from the plans only with the Ukuru class. Mass production wasn't attempted until the Ukuru class and the Type C&D, which extensively employed welding and pre-fabrication.

During WWII the coastal defense ship classification was also used for the two former Chinese light cruisers Ning Hai and Ping Hai, in late 1943 the IJN decided to rebuild the two idle ships into escorts with a radically altered superstructure and armament analogous to the Type C&D kaibokan, they were respectively renamed Iaoshima and Isoshima. These relatively large ships were also supposed to serve as tenders for aircraft bases, for this purpose they were equipped with a crane on the mainmast, trucks, one daihatsu (14-m), and one shohatsu (10-m) landing craft. Yasoshima was re-rated as a light cruiser for administrative reasons on 25 September 1944, it had been decided to appoint her as flagship for the newly organized First Transport Squadron, a role that required her to be rated as a light cruiser.

Type Main Class Sub Class Sub Sub Class
Type A Shimushu-class Shimushu-class
Type A Kai Etorofu-class Etorofu-class
Type B Mikura-class
Type B bis Hiburi-class[1]
Type B Kai Ukuru-class
Type C Type C[2]
Type D Type D
  1. Sometimes, Hiburi-classes are considered as Ukuru-sub-classes instead, since they shared the same hull.
  2. Not implemented yet


This category has the following 6 subcategories, out of 6 total.