I think she will topple over if someone in the conning tower gives of a healthy sneeze...
While it's certanly a cool idea, I don't think Japan would make more 6-turret designs after the N.13 class(which wasn't one, but I'm talking about hypothetical projects after that), due to the stress it put on the hull. And having two super-superfiring(
) mounts will not help the balance. If twelve guns would again be an idea, I think Japan would do some thinking on three-gun mounts instead.
But, at said, it's a very cool idea.