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41cm Twin Gun Mount

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41cm Twin Gun Mount

No.8 41cm連装砲

Large Caliber Main Gun Large Caliber Main Gun

Effects: Firepower+20 Anti-Air+4 Range Long

Scrap Value: Ammunition12 Steel20

Equipment Card 41cm Twin Gun Mount.png

Equipment Character 41cm Twin Gun Mount.png

Equipment Item 41cm Twin Gun Mount.png

Equipment Full 41cm Twin 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



Developed by Kure Naval Arsenal's Artillery Division, this is the first entirely domestic battleship gun.
At a little over 16 inches (40.6cm), this 41cm gun was the largest battleship gun in the world until the introduction of the Yamato-class' 46cm guns.
It was equipped on Nagato and Mutsu who it was praised by many fans as two of the great power's "Big 7".


How To Obtain

Updates History

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
Large Caliber Main Gun 41cm Twin Gun Mount 0 30 350 480 0 3/4 2/3 1xRedGunHeavy.png M M1 M2 M M1 M2 N X M M1 N N Nagato
Mutsu Kai
Mutsu Kai Ni
Upgrades to Prototype 41cm Triple Gun Mount.
6 4/7 3/6 2xRedGunHeavy.png
10 12/20 10/15 2xRedGunHeavy.png
2xItem Icon New Model Gun Mount Improvement Material.png


Developed for the IJN's first 'Eight-Eight Fleet Program' in 1910, in which Japan initially intended to build eight battleships and eight armored cruisers. The Washington Naval Treaty of 1922 scrapped the various plans for other ships to carry this gun, leaving the Nagato-class as the sole class. 

See Also

41 cm/45 3rd Year Type naval gun
Eight-Eight Fleet Program