- Class: Hiyo - 2 aircraft carriers of 1940
- Displacement: 24,140 tons
- Dimensions: 675.75 (pp) 719.5 (oa) x 87.75 x 26.25 ft. F.D. 689.75 x 89.5 ft.
- Machinery: 2-shaft geared turbines, S.H.P. 56,250 = 25.5 knots
- Armament: 12-5 in. (6x2), 24-25 mm. (8x3) A.A. guns
- Aircraft: 53
- Complement: 1,224
- Builder: Mitsubishi, Nagasaki
- Laid Down: 20 Mar 1939
- Launched: 26 Jun 1941
- Completed: 5 May 1942
- Service: Construction began in 1939 as luxury liner Kashiwara Maru for the N.Y.K. line. Conversion to aircraft carrier begun in 1940 while still on stocks. Dutch Harbor, Aleutians, Santa Cruz, Guadalcanal, Philippine Sea (damaged). Further damaged by torpedoes from US submarines Redfish and Sea Devil off Nagasaki 9 Dec 1944; not repaired and laid up for remainder of war.
Sister Hiyo, begun as liner Izumo Maru, was sunk at the Battle of the Philippine Sea, 20 Jun 1944.