The J/BB/1933 design almost seems too capable

The J/BB/1933 design is so capable, that it almost seems to be unrealistic. You have an armament of 10-18in BLR, 12-6in QG, 20-5in DP, and 56-57mm AA guns. The speed is 30 knots with a range of 12,000nm at 15 knots. The armour basis is 17in with 8in deck and a 7in torpedo bulkhead. This is the Springsharp report:

J/BB/1933, Japan Battleship laid down 1933

Displacement:
 76,740 t light; 80,090 t standard; 85,900 t normal; 90,548 t full load

Dimensions: Length overall / water x beam x draught
 900.57 ft / 895.00 ft x 127.00 ft x 34.00 ft (normal load)
 274.49 m / 272.80 m x 38.71 m  x 10.36 m

Armament:
      10 - 18.00" / 457 mm guns (4 mounts), 2,916.00lbs / 1,322.68kg shells, 1933 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 6.00" / 152 mm guns (4x3 guns), 108.00lbs / 48.99kg shells, 1933 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships
      20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1933 Model
   Dual purpose guns in deck mounts with hoists
   on side, evenly spread, 6 raised mounts
      56 - 2.24" / 57.0 mm guns (28x2 guns), 5.65lbs / 2.56kg shells, 1933 Model
   Anti-aircraft guns in deck mounts 
   on side, evenly spread, 18 raised mounts
 Weight of broadside 32,022 lbs / 14,525 kg
 Shells per gun, main battery: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 17.0" / 432 mm 640.00 ft / 195.07 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 12.0" / 305 mm 640.00 ft / 195.07 m 8.00 ft / 2.44 m
   Main Belt covers 110 % of normal length

   - Torpedo Bulkhead:
  7.00" / 178 mm 640.00 ft / 195.07 m 33.00 ft / 10.06 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 17.0" / 432 mm 13.0" / 330 mm  17.0" / 432 mm
 2nd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm

   - Armour deck: 8.00" / 203 mm, Conning tower: 17.00" / 432 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 248,345 shp / 185,266 Kw = 30.00 kts
 Range 12,000nm at 15.00 kts
 Bunker at max displacement = 10,459 tons

Complement:
 2,508 - 3,261

Cost:
 £33.381 million / $133.523 million

Distribution of weights at normal displacement:
 Armament: 4,003 tons, 4.7 %
 Armour: 35,561 tons, 41.4 %
    - Belts: 6,822 tons, 7.9 %
    - Torpedo bulkhead: 5,470 tons, 6.4 %
    - Armament: 8,125 tons, 9.5 %
    - Armour Deck: 14,431 tons, 16.8 %
    - Conning Tower: 713 tons, 0.8 %
 Machinery: 7,236 tons, 8.4 %
 Hull, fittings & equipment: 29,940 tons, 34.9 %
 Fuel, ammunition & stores: 9,160 tons, 10.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   137,151 lbs / 62,211 Kg = 47.0 x 18.0 " / 457 mm shells or 28.9 torpedoes
 Stability (Unstable if below 1.00): 1.14
 Metacentric height 9.2 ft / 2.8 m
 Roll period: 17.6 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.60
 Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.778
 Length to Beam Ratio: 7.05 : 1
 'Natural speed' for length: 29.92 kts
 Power going to wave formation at top speed: 54 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 6.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  34.00 ft / 10.36 m
    - Forecastle (20 %): 27.00 ft / 8.23 m
    - Mid (67 %):  27.00 ft / 8.23 m
    - Quarterdeck (15 %): 27.00 ft / 8.23 m
    - Stern:  27.00 ft / 8.23 m
    - Average freeboard: 27.56 ft / 8.40 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 74.5 %
  - Above water (accommodation/working, high = better): 199.9 %
 Waterplane Area: 97,505 Square feet or 9,059 Square metres
 Displacement factor (Displacement / loading): 105 %
 Structure weight / hull surface area: 234 lbs/sq ft or 1,141 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.99
  - Longitudinal: 1.12
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent