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12cm Single Gun Mount

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No.1 12cm単装砲
RedGunLight.png Small Caliber Main Gun
Effects: Firepower+1 AA+1 RangeShort
Scrap value: Ammo 1 Steel 1 (Buildable)

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 Ship Destroyer
Light Cruiser Torpedo Cruiser
Heavy Cruiser Training Cruiser
Aviation Cruiser Fast Battleship
Battleship Aviation Battleship
Light Carrier Standard Aircraft Carrier
Armored Carrier Seaplane Tender
Submarine Aircraft Carrying Submarine
Submarine Tender Fleet Oiler
Repair Ship Amphibious Assault Ship



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


Main GunsSmall Caliber Main GunMedium Caliber Main GunLarge Caliber Main Gun are the main armament used by surface ships. Their main stats are the "firepower" Firepower and "accuracy" Accuracy. They are notably required to trigger all Artillery Spotting attacks as well as some Night Cut-Ins, notably the "Double Attack" (DA).


How To Obtain


Stock equipment of: Asakaze KaiAsakaze Kai, AsakazeAsakaze, EtorofuEtorofu, FukaeFukae, FumizukiFumizuki, HachijouHachijou, Harukaze KaiHarukaze Kai, HarukazeHarukaze, Hatakaze KaiHatakaze Kai, HatakazeHatakaze, HiratoHirato, IshigakiIshigaki, Kamikaze KaiKamikaze Kai, KamikazeKamikaze, KikuzukiKikuzuki, KisaragiKisaragi, KunashiriKunashiri, Matsukaze KaiMatsukaze Kai, MatsukazeMatsukaze, MatsuwaMatsuwa, MikazukiMikazuki, MinazukiMinazuki, MochizukiMochizuki, MutsukiMutsuki, NagatsukiNagatsuki, SadoSado, SatsukiSatsuki, ShimushuShimushu, TsushimaTsushima, UzukiUzuki, YayoiYayoi


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 quest: F97

Updates History

  • 2013-04-23: Implemented with initial game release
  • 2018-07-12: Became improvable and upgradeable to 12cm Single Gun Mount Kai 212cm Single Gun Mount Kai 2
  • 2018-08-17: Card CG updated


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
Improvement Improved effects
Small Caliber Main Gun 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Night Battle Power 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy Day 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy Night 1.30 1.84 2.25 2.60 2.91 3.18 3.44 3.68 3.90 4.11


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 afterward, but Chokai alone was equipped with 12cm singles throughout her career).

See Also

12 cm/45 3rd Year Type naval gun