''An improved version of the large caliber guns ordered from the United Kingdom at the time of Kongou-class construction. Later produced domestically, it was made a standard battleship armament up to the Ise-class. While the main objective was to improve accuracy and the rate of fire, efforts were made to lower the weight and improve protection.<br>Their power reaches its peak when used on the remodeled Fast Battleships of Kongou-class. | ''An improved version of the large caliber guns ordered from the United Kingdom at the time of Kongou-class construction. Later produced domestically, it was made a standard battleship armament up to the Ise-class. While the main objective was to improve accuracy and the rate of fire, efforts were made to lower the weight and improve protection.<br>Their power reaches its peak when used on the remodeled Fast Battleships of Kongou-class. |