| − | ''An improved version of a triple main battery for purely domestic battleships that was developed at the artillery department of the Kure Naval Arsenal.<br>Although it is a what-if version, it is a gun with reduced weight and improved fire control system, turning it into a battleship main armament optimized for aviation battleships, especially the Ise-class aviation battleships.<br>The Ise-class Kai Ni in particular, after undergoing its large-scale remodel, will show its full potential.
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