The A-150 Design, also known as the Yamamoto-class, was a Japanese battleship design The project, started between 1938 and 1939, and was completed in 1944. The A-150 design has been the "most powerful battleship in history" due to to the large size of its main battery of 12 pieces of 510 mm, as well as to the numerous smaller caliber guns.

Displacement
78,000 t
81 809 t apc
Length 283 meters
Beam 38.9 meters
Draft 12.10 m maximum

Armament
• 8 510 mm cannons
• 3 guns of 155 mm
• 48 guns of 127 mm
• 128 AA 25mm cannons
• 24 AA 13mm guns
• 6 AA 30mm rocket launchers

Propulsion
12 Kanpon boilers
4 steam turbines
4 6-meter three-bladed propellers

Power 168,000 hp (120 MW)
Speed ​​27 knots (50 km / h)
Range 7,200 nautical miles at 16 knots (13,000 km at 30 km / h)
Crew 3450
Aircraft 7 seaplanes (maximum)

Aircraft equipment
• 2 catapults
• 1 hangar