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12cm Single Gun Mount

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12cm Single Gun Mount

No.1 12cm単装砲

Small Caliber Main Gun Small Caliber Main Gun

Effects: Firepower+1 Anti-Air+1 Range Short

Scrap Value: Ammunition1 Steel1

Equipment Card 12cm Single Gun Mount.png

Equipment Character 12cm Single Gun Mount.png

Equipment Item 12cm Single Gun Mount.png

Equipment Full 12cm Single Gun Mount.png

Refittable Class
Coastal Defense ShipDestroyer
Light CruiserTorpedo Cruiser
Heavy CruiserAviation Cruiser
BattleshipAviation Battleship
Fast BattleshipLight Carrier
Standard CarrierArmored Carrier
Seaplane TenderSubmarine Tender
SubmarineSubmarine Carrier
Repair ShipTraining Cruiser
Fleet OilerAmphibious Assault Ship



This is an old model small calibre gun.
It was equipped on older destroyers as their main armament.
Both loading and rotation was manual, but with its simple construction and low cost, it served a long time as main weapon of destroyers and coastal defense ships. It cannot be used for anti-air.



Used to improve 12cm Single Gun Mount12cm Single Gun Mount, 12cm Single Gun Mount Kai 212cm Single Gun Mount Kai 2, 12cm Single High-angle Gun Mount Model E12cm Single High-angle Gun Mount Model E

Used by quests: F97

Used by limited-time quests: SF2

Updates History

  • 2013-04-23: Implemented with initial game release
  • 2018-07-12: Became improvable and upgradeable to 12cm Single Gun Mount Kai 2
  • 2018-08-17: Card CG updated

Akashi's Improvement Arsenal

Type Name Resource Day 2nd Ship Note
Fuel Ammunition Steel Bauxite Item Icon Development Material.png Item Icon Improvement Material.png # of equipment needed for that upgrade. An asterisk following the number indicates a different equipment is required. Sun Mon Tue Wed Thu Fri Sat
Small Caliber Main Gun 12cm Naval Gun 0 10 20 40 0 2/2 1/2 1xRedGunLight.png Mutsuki

Uses 12cm Single Gun Mount for improvement up to ★+10
Uses Type 22 Surface Radar to upgrade into 12cm Naval Gun Kai 2.
6 2/3 1/2 2xRedGunLight.png
10 2/4 2/6 1xRadar.png


This gun's basic structure was based on the British QF 4.7in. Mk.IV gun, which was later produced domestically in Japan. The barrel of this gun was later mated to a high-angle mounting and served as AA guns for early Japanese heavy cruisers (ie. Furutaka-class to Takao-class. Both classes had their AA guns exchanged for 12.7cm twin afterwards, but Chokai alone was equipped with 12cm singles throughout her career).

See Also

12 cm/45 3rd Year Type naval gun