This gun is the modified version of the twin gun which was used Shiratsuyu, Asashio and -Class destroyer. The main difference between the Type B and Type C is that instead of the former's elevation range of −5° to +75°, type C's range is reverted back to +55° of the A's model but with a new -7°; which is required for flat-nosed anti-submarine shell developed during that time . Type C armor, however, was reduced to save weight, but they still prove effective enough to withstand heavy sea and splinter.
It is an aged small caliber gun. Improvement of countermeasures against stormy shocks by shielding the entire gun turrets and improved electrical system, repair system was also been adapted to some later model of small warships.
It is an improved type of the main gun mounted on the fleet destroyer until the mid-stage of the war.