Tosa-class battleship

Scale model of Kaga as originally designed
Class overview
Name	Tosa class
Builders	Mitsubishi Shipyard, Nagasaki Kawasaki Shipyard, Kobe
Operators	Imperial Japanese Navy
Preceded by	Nagato class
Succeeded by	Kii class
Built	1920–1922
Planned	2
Completed	1 converted to an aircraft carrier (Kaga)
Cancelled	1
General characteristics
Type	Dreadnought battleship
Displacement	39,900 t (39,300 long tons) (normal) 44,200 t (43,500 long tons) (full load)
Length	234.09 m (768 ft)
Beam	30.5 m (100 ft 1 in)
Draft	9.4 m (30 ft 10 in)
Installed power	12 × water-tube boilers 91,000 shp (68,000 kW)
Propulsion	4 × shafts; 4 × geared steam turbines
Speed	26.5 knots (49.1 km/h; 30.5 mph)
Range	5,500 nmi (10,200 km; 6,300 mi) at 16 knots (30 km/h; 18 mph)
Armament	5 × twin 41 cm (16.1 in) guns 20 × single 14 cm (5.5 in) guns 4 × single 7.62 cm (3 in) AA guns 8 × 61 cm (24 in) torpedo tubes
Armor	Waterline belt: 280 mm (11 in) Deck: 102 mm (4 in) Barbettes: 229–305 mm (9–12 in) Conning tower: 356 mm (14 in)

The Tosa-class battleships (土佐型戦艦, Tosa-gata Senkan)^{[A 1]} were two dreadnoughts ordered as part of the "Eight-Eight" fleet for the Imperial Japanese Navy (IJN) during the early 1920s. The ships were larger versions of the preceding Nagato class, and carried an additional 41-centimeter (16.1 in) twin-gun turret. The design for the class served as a basis for the Amagi-class battlecruisers.

Both ships were launched in late 1921, but the first ship, Tosa, was cancelled in accordance with the terms of the Washington Naval Treaty before it could be completed, and was used in experiments testing the effectiveness of its armor scheme before being scuttled in the Bungo Channel. The hull of the second ship, Kaga, was converted into an aircraft carrier of the same name. The carrier supported Japanese troops in China during the Second Sino-Japanese War of the late 1930s, and took part in the attack on Pearl Harbor on 7 December 1941 and the invasion of Rabaul in the Southwest Pacific in January 1942. The following month her aircraft participated in a combined carrier airstrike on Darwin, Australia, during the Dutch East Indies campaign. She was sunk during the Battle of Midway in 1942.
Cite error: There are <ref group=A> tags on this page, but the references will not show without a {{reflist|group=A}} template (see the help page).