The Ship Model Forum

A few more pictures:
Armour scheme of Battleship "X"
[url=http://img34.imageshack.us/i/img090m.jpg/][img]http://img34.imageshack.us/img34/4248/img090m.jpg[/img][/url]
Japanese 1920's designs for battleships
[url=http://img812.imageshack.us/i/img092x.jpg/][img]http://img812.imageshack.us/img812/1687/img092x.jpg[/img][/url]

Japanese 1920's designs for battleships
[url=http://img233.imageshack.us/i/img093a.jpg/][img]http://img233.imageshack.us/img233/8035/img093a.jpg[/img][/url]

Hiraga*
From Admiral Hiraga, link from the Wikipedia article:[url]http://en.wikipedia.org/wiki/Yuzuru_Hiraga[/url].
Here is some drawings of a proposed IJN Kongo and IJN Fuso class replacements, one of the drawings(Battleship H and D, is an evolution of the IJN Amagi/IJN Kii class):
The battleship "X":
[url=http://img847.imageshack.us/i/img089u.jpg/][img]http://img847.imageshack.us/img847/9445/img089u.jpg[/img][/url]
The earlier incarnation of battleship "X", Battleships "H" nd "D"

[url=http://img829.imageshack.us/i/img094m.jpg/][img]http://img829.imageshack.us/img829/7866/img094m.jpg[/img][/url]

A-140 project designs that eventually evolved to IJN Yamato class
[url=http://img140.imageshack.us/i/img095v.jpg/][img]http://img140.imageshack.us/img140/1807/img095v.jpg[/img][/url]

Navy Yard, Volume 16, Spring 2011 issue has an article on a full-scratch built model of a proposed Kongo/Hirago Class BB replacement ship.

Appears to feature Yamato's main armament, plus a fourth, two barrell turret. Beautiful raked funnel and additional secondary armaments. Not much AA armament on this build.

Worth a look.