Specifications as completed
Displacement: 33,161 tons trial
Dimensions: 754.5 x 97 x 26 feet/230 x 29.5 x 8 meters
Extreme Dimensions: 782.5 x 100 x 26 feet/238.5 x 30.5 x 8 meters
Propulsion: Steam turbines, 12 boilers, 4 shafts, 91,000 shp, 27.5 knots
Armor: 11 inch belt
Armament: 2 dual, 6 single 8/50 SP, 6 dual 4.7/45 DP, 22 MG
Specifications following reconstruction
Displacement: 43,650 tons full load
Dimensions: 788.5 x 106.5 x 31 feet/240.3 x 32.5 x 9.5 meters
Extreme Dimensions: 812.5 x 106.5 x 31 feet/247.6 x 32.5 x 9.5 meters Propulsion: Steam turbines, 8 boilers, 4 shafts, 127,400 shp, 28.34 knots
Armor: 11 inch belt
Armament: 10 single 8/50 SP, 8 dual 5/40 DP, 22 25 mm AA
Aircraft: 81 (90 maximum)
A fast battleship cancelled under the Washington Treaty and reordered as a carrier to replace Amagi. She was Japan's second large carrier became a semi-sister to Akagi.
Hull essentially unchanged. Completely reworked from the main deck up, with dual-level hangar. Had short flying-off decks at the bow, opening directly from the hangars, in addition to the main flight deck. Completed without an island. She mounted a cruiser's gun armament, partially in turrets and partially in casemates. The short flying-off decks were nearly useless. Boiler exhausts were run aft to the stern beside the hangar deck. Limited by relatively slow speed.
A small island was installed on the starboard side prior to reconstruction.
Underwent a major reconstruction to remove the forward flying decks, improve speed, and modernize the ship. The forward flying decks were eliminated, the hangars extended forward, and the main flight deck lengthened, widened and strengthened. A starboard-side island was installed. The gun armament was re-arranged and improved. She was completely re-engined; boiler exhuasts replaced by a downward-angled starboard-side funnel. Aircraft arrangements were improved and there were general updates throughout.
Generally operated with semi-sister Akagi. Saw extensive service as one of the primary Japanese carriers prior to and during WWII.
Departure from Service/Disposal:
Lost at Midway.