Today is a good day to show you a very interesting IJN design. This design is definately from 1920s times, and it is a direct successor of such ships as Nagato, and, of course, Kaga and Akagi (in their original design).
Here it is:
As you can see, this is a very powerfull ship: it has six twin 410mm guns, what gives us twelve in summary.
While it is fast with the approximate speed of 30 knots, it is comparatively well armored with his 12" belt aswell.
Also, if you look closely to how the gun mounts are situated, you'll see that mounts are divided into three groups of two mounts each, thus making firecontrol easier to operate.
When taking into consideration the actual rate of fire of the Nagato class, which was 1.5 to 2.5 rounds per minute, we will get the 18 to 30 tonns weight of salvo per minute.
Iowa had "only" 22 tonns weight of salvo per minute, for example.
I think this ship will take a respected place in the post-release updates of World of Warships.