[Edit]
381mm/50 Triple Gun Mount Kai
No.137 381mm/50 三連装砲改
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 Large Caliber Main Gun (381mm)Effects:
 +21  +4  -1  -1  Very LongScrap value:
 16  22  1 (Unbuildable) | |
| 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 |
Introduction
パスタの国が生んだ三連装型の戦艦主砲です。
高射速の50口径、中近距離戦闘での火力は同クラス最強です。また、射程も大和型46cm砲と同等以上のカタログスペックを誇ります。砲の耐久性や命中率に課題を残していましたが、改修によってその命中精度などが向上しています。
This is a triple gun, battleship main cannon from the land of pastas. With its 50 caliber, it is the strongest among its battleship peers. It's also known for its comparable range with that of the Yamato class's 46cm cannons. While it had problems with its accuracy and barrel life, the improved version resolved said problems.
Notes
Unbuildable
Category Equipment that consume 381mm/50 Triple Gun Mount Kai during improvement not found
- Spring 2015 Event E-4 Hard and E-5 Medium/Hard reward.
Improvement
Improvement Cost:  40 440 500 50
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★ | 
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S | M | T | W | T | F | S | Helper Ship |
|---|---|---|---|---|---|---|---|---|---|---|---|
Consumes: 1x  41cm Twin Gun Mount
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0 | 5/7 | 3/4 | L |
L |
R |
R |
R |
R |
L |
Littorio (Italia) Roma (Kai) |
| Consumes: 2x 41cm Twin Gun Mount
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6 | 7/10 | 4/6 |
Trivia
It is highly likely this is the Model 1939 triple gun turret used on Roma and Impero, produced by Ansaldo and OTO (Odero-Terni-Orlando)