Japanese battleship Tosa

Tosa at Nagasaki on 31 July 1922; the ship is only complete up to the main deck, hence the lack of any superstructure aside from the small bridge
History
Empire of Japan
Name	Tosa
Namesake	Tosa Province
Ordered	1918 Fiscal Year
Builder	Mitsubishi (Nagasaki Shipyard & Machinery Works), Nagasaki
Laid down	2 February 1920
Launched	18 December 1921
Fate	Construction cancelled, 5 February 1922 Scuttled, 9 February 1925
General characteristics
Class and type	Tosa-class battleship
Displacement	39,900 long tons (40,540 t) (standard) 44,200 long tons (44,909 t) (full load)
Length	234.1 m (768 ft 1 in)
Beam	30.5 m (100 ft 1 in)
Draught	9.4 m (30 ft 10 in)
Installed power	12 × water-tube boilers 91,000 shp (67,859 kW)
Propulsion	4 shafts; 4 × steam turbines
Speed	26.5 knots (49.1 km/h; 30.5 mph)
Range	5,000 nmi (9,300 km; 5,800 mi) at 16 knots (30 km/h; 18 mph)
Complement	1,333
Armament	5 × twin 41 cm (16.1 in) guns 20 × single 14 cm (5.5 in) guns 4 × single 76 mm (3 in) AA guns 8 × 61 cm (24 in) torpedo tubes
Armour	Deck: 100 mm (4 in) Bulkheads: 230–280 mm (9–11 in) Belt line: 250–280 mm (10–11 in) Bridge: 250–360 mm (10–14 in) Barbettes: 230–300 mm (9–12 in) Conning tower: 360 mm (14 in)

Tosa (土佐) was a planned battleship of the Imperial Japanese Navy. Designed by Yuzuru Hiraga, Tosa was to be the first of two Tosa class ships. Displacing 39,900-long-ton (40,540 t) and armed with ten 410 mm (16.1 in) guns, these warships would have brought Japan closer to its goal of an "Eight-four" fleet (eight battleships and four battlecruisers). All work on the ship was halted after the Washington Naval Conference and the signing of the Washington Naval Treaty. As the vessel had to be destroyed in accordance with the terms of the treaty, it was subjected to various tests to gauge the effectiveness of Japanese weaponry before being scuttled on 9 February 1925.