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{{EquipmentInfoKai}}
==Introduction==
呉海軍工廠砲熕部で開発された初の純国産戦艦主砲です。<br>16インチ（40.6cm）を僅かに上回る、この41cm砲は「大和」型の46cm砲が登場するまで世界最大の戦艦砲でした。<br>これを搭載した「長門」「陸奥」は、当時世界列強の「ビッグ7」として、多くのファンに称えられていました。
''Developed by Kure Naval Arsenal's Artillery Division, this is the first entirely domestic battleship gun.<br>At a little over 16 inches (40.6 cm), this 41 cm gun was the largest battleship gun in the world until the introduction of the Yamato-class' 46 cm guns.<br>It was equipped on Nagato and Mutsu who it was praised by many fans as two of the great power's "Big 7".
==Mechanics==
{{Category:Main Guns}}
==Notes==
===How To Obtain===
'''Buildable'''
'''Stock equipment of:''' {{Ship/Link|Fusou Kai Ni}}, {{Ship/Link|Haruna Kai}}, {{Ship/Link|Hiei Kai Ni}}, {{Ship/Link|Hiei Kai}}, {{Ship/Link|Kirishima Kai Ni}}, {{Ship/Link|Kirishima Kai}}, {{Ship/Link|Kongou Kai Ni}}, {{Ship/Link|Kongou Kai}}, {{Ship/Link|Mutsu Kai Ni}}, {{Ship/Link|Mutsu Kai}} (x2), {{Ship/Link|Mutsu}}, {{Ship/Link|Nagato Kai Ni}}, {{Ship/Link|Nagato Kai}} (x2), {{Ship/Link|Nagato}}, {{Ship/Link|Yamashiro Kai Ni}}
'''From quest:''' {{Q|A92}} (x2, choice), {{Q|B129}} (x4, choice)
===Uses===
'''Used to improve:''' {{Equipment/Link|41cm Twin Gun Mount}}, {{Equipment/Link|38cm Twin Gun Mount}}, {{Equipment/Link|Prototype 35.6cm Triple Gun Mount}}, {{Equipment/Link|Prototype 41cm Triple Gun Mount}}, {{Equipment/Link|38cm Twin Gun Mount Kai}}, {{Equipment/Link|Prototype 46cm Twin Gun Mount}}, {{Equipment/Link|381mm/50 Triple Gun Mount Kai}}, {{Equipment/Link|16inch Triple Gun Mount Mk.7}}, {{Equipment/Link|38.1cm Mk.I Twin Gun Mount}}, {{Equipment/Link|38.1cm Mk.I/N Twin Gun Mount Kai}}, {{Equipment/Link|30.5cm Triple Gun Mount}}, {{Equipment/Link|41cm Triple Gun Mount Kai}}, {{Equipment/Link|38cm Quadruple Gun Mount}}, {{Equipment/Link|38cm Quadruple Gun Mount Kai}}, {{Equipment/Link|51cm Twin Gun Mount}}, {{Equipment/Link|41cm Triple Gun Mount Kai Ni}}, {{Equipment/Link|41cm Twin Gun Mount Kai Ni}}, {{Equipment/Link|16inch Mk.I Twin Gun Mount}}, {{Equipment/Link|16inch Mk.V Twin Gun Mount}}, {{Equipment/Link|16inch Mk.VIII Twin Gun Mount Kai}}, {{Equipment/Link|16inch Triple Gun Mount Mk.6}}, {{Equipment/Link|16inch Triple Gun Mount Mk.6 mod.2}}, {{Equipment/Link|16inch Mk.I Triple Gun Mount}}, {{Equipment/Link|16inch Mk.I Triple Gun Mount + AFCT Kai}}, {{Equipment/Link|35.6cm Twin Gun Mount Kai}}
'''Used by quest:''' {{Q|F74}}
===Updates History===
* '''2013-04-23:''' Implemented with initial game release
* '''2014-07-18:''' Card CG updated
* '''2014-07-28:''' [[Hidden Fit Bonuses]] added
* '''2014-12-01:''' Became improvable
* '''2017-06-06:''' Became upgradeable to {{Equipment/Link|Prototype 41cm Triple Gun Mount}}
==Improvement==
{{AkashiWorkshopKai
|DM_1= 3|DM_1g= 4
|DM_2= 4|DM_2g= 7
|IM_1= 2|IM_1g= 3
|IM_2= 3|IM_2g= 6
|Equ_1= 41cm Twin Gun Mount
|Equ_2= 41cm Twin Gun Mount|Equ_2_qty= 2
|Conv_A= Prototype 41cm Triple Gun Mount
|DM_A= 12|DM_Ag= 20
|IM_A= 10|IM_Ag= 15
|Equ_A= 46cm Triple Gun Mount|Equ_A_qty= 2
|Item_A1= New Model Gun Mount Improvement Material|Item_A1_qty= 2
|Fuel= 30|Ammo= 350|Steel= 480|Bauxite= 0
|Helper1A= Nagato|Week1A= 0100110|Helper1AM= Nagato/Kai/Ni
|Helper2A= Mutsu|Week2A= 1001001|Helper2AM= Mutsu/Kai
|Helper3A= Mutsu Kai Ni|Week3A= 1000001
}}
{{:Improvement/Categories/(Very) Large Guns}}
==Trivia==
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==
[[wikipedia:41 cm/45 3rd Year Type naval gun|41 cm/45 3rd Year Type naval gun]]<br>
[[wikipedia:Eight-eight_fleet|Eight-Eight Fleet Program]]
{{Equipmentlist}}
{{EquipmentCategoriesKai|{{{1|{{PAGENAME}}}}}}}