''This is an old model small-caliber gun.<br>It was equipped on older destroyers as their main armament.<br> Both loading and rotation were manual, but with its simple construction and low cost, it served a long time as the main weapon of destroyers and coastal defense ships.<br>It cannot be used for anti-air.''
==Mechanics==
==Mechanics==
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==Trivia==
==Trivia==
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This gun's basic structure was based on the British [[wikipedia:QF 4.7-inch Gun Mk I–IV|QF 4.7in. Mk.IV gun]], which was later produced domestically in Japan. The barrel of this gun was later mated to a high-angle mounting and served as AA guns for early Japanese heavy cruisers (ie. Furutaka-class to Takao-class. Both classes had their AA guns exchanged for [[12.7cm Twin High-angle Mount|12.7cm twin]] afterward, but Chokai alone was equipped with 12cm singles throughout her career).
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This gun's basic structure was based on the British [[QF 4.7inch Gun Mk.XII Kai]], which was later produced domestically in Japan. The barrel of this gun was later mated to a high-angle mounting and served as AA guns for early Japanese heavy cruisers (ie. Furutaka-class to Takao-class, both classes had their AA guns exchanged for [[12.7cm Twin High-angle Mount|12.7cm twin]] afterward, but Chokai alone was equipped with 12cm singles throughout her career).
==See Also==
==See Also==
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[[wikipedia:12 cm/45 3rd Year Type naval gun|12 cm/45 3rd Year Type naval gun]]