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35.6cm Twin Gun Mount Kai Yon

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No.503 35.6cm連装砲改四
RedGunHeavy.png Large Caliber Main Gun (??)
Effects: Firepower+22 AA+5 Armor+2 Accuracy+4 Evasion+1 RangeLong
Scrap value: Ammo 22 Steel 24 Bauxite 12 (Unbuildable)

Equipment Card 35.6cm Twin Gun Mount Kai Yon.png

Equipment Character 35.6cm Twin Gun Mount Kai Yon.png

Equipment Item 35.6cm Twin Gun Mount Kai Yon.png

Equipment Full 35.6cm Twin Gun Mount Kai Yon.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



The main gun of the improved Kongou-class, especially refurbished and improved for the remodel of "Haruna", it is a “what if” improved and strengthened late model of a 35.6cm.
It incorporates a high-precision rangefinder to improve shooting speed, following various battle lessons, and can also be coupled with various radars.
The operability in naval combat, including night battles, has been greatly improved.
It will demonstrate its true value even more when upgraded and used on "Haruna Kai Ni C", which specializes in naval combat!


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).

  • Most main guns come with "Hidden Fit Bonuses/Penalties", especially larger ones.
  • Is essential for AACI n° 46.


How To Obtain

From quest: F116

Updates History

  • 2023-05-01: Implemented

Fit Bonuses

35.6cm Twin Gun Mount Kai Yon/Bonuses


Improvement Improved effects
Large Caliber Main Gun 1★ 2★ 3★ 4★ 5★ 6★ 7★ 8★ 9★ Max★
Firepower 1.50 2.12 2.59 3.00 3.35 3.67 3.96 4.24 4.50 4.74
Night Battle Power 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16
Accuracy 1.00 1.41 1.73 2.00 2.23 2.44 2.64 2.82 3.00 3.16

See Also