My thought was that Nagato was basically an updated QE (the IJN/RN talked a lot) so wanted to get a early Nagato with 15inch guns.
The stern was grabed from Nagato rebuild (admitadly by the time they rebuilt they where not talking so it maybe dosnt fit as well
).
Stats Rato - class fast battleship
Displacement: 32,720 metric tons (32,200 long tons) (standard)
Length: 215.8 m (708 ft 0 in)
Beam: 29.02 m (95 ft 3 in)
Draft: 9.08 m (29 ft 9 in)
Installed power: 80,000 shp
Speed: 26 knots
Armament:
4 × twin 15' guns
16 × single 6' guns
4 × single 76 mm AA guns
Rebuilt (45)
10x twin 4.5' DP guns
9 x oct 2pdr AA
24 x 20mm AA
JSB