The Japanese No. 13-class
An item referred to the British monthly magazine The Navy reporting that Japan in the near future probably would introduce the 45,7cm/18” gun. The same calibre was also to be used as main armament for the battleships (1) under construction in 1922 but never completed due to the limits of the Naval Treaty of Washington.(2)
Notes
1. The Number-13 class 46.700 tons fast battleships was cancelled on 19 November 1923 even before the building could be started. Their main armament was to consist of 4x2-18”guns.
2. Naval Treaty of Washington between the United States, British Empire, Japan, France and Italy signed on 6 February 1922 as a result of the Washington Naval Conference between November 1921-February 1922 which intended to limit the total capitals ship tonnage of these five major powers.
