10cm Twin High-angle Gun Mount
|Coastal Defense Ship||Destroyer|
|Light Cruiser||Torpedo Cruiser|
|Heavy Cruiser||Training Cruiser|
|Aviation Cruiser||Fast Battleship|
|Light Carrier||Standard Carrier|
|Armored Carrier||Seaplane Tender|
|Submarine||Aircraft Carrying Submarine|
|Submarine Tender||Fleet Oiler|
|Repair Ship||Amphibious Assault Ship|
"Main weapon for AA destroyers. The groundbreaking long-barrel semi-automatic loaded gun mounted on turret, popularly known as Long 10cm, equipped on Akizuki-class destroyers. Its complex structure made it difficult to mass-produce, but it's a silver bullet against enemy aircraft."
Not to be confused with the 10cm Twin High-angle Gun Mount (Carriage).
One of Japan's relatively successful anti-air weapon, being equipped on carrier Taihou, light cruiser Ooyodo and Akizuki-class destroyers (the illustration shows the turret-mounted variant seen on Akizuki-class; Ooyodo and Taihou were equipped with carriage-mounted ones). Both muzzle velocity and operating speed were increased significantly compared to traditional destroyer guns, making it more effective against enemy aircraft. Its anti-surface ability was not as high due to accuracy and ammunition mass but in-game it has the same firepower stat as the twin 12.7cm. Although the gun proved effective, the IJN's anti-air ability still lagged behind as the anti-air fire control device was outdated.
It is easily accessible in-game as most destroyers carry it as stock equipment upon remodel; Chief Developer Kensuke Tanaka once regretted that this weapon "was deployed rather too early, even before the Akizuki-class appeared in-game" in an interview.