Kasuga-class cruiser

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Kasuga in 1900
Class overview
Name	Kasuga class
Builders	Gio. Ansaldo & C., Genoa, Italy
Operators	Imperial Japanese Navy
Preceded by	Azuma
Succeeded by	Tsukuba class
Built	1902–1904
In commission	1904–1945
Completed	2
Lost	2
General characteristics
Type	Armored cruiser
Displacement	7,628 long tons (7,750 t) Kasuga 7,698 long tons (7,822 t) Nisshin
Length	108.8 m (356 ft 11 in) w/l 111.73 m (366 ft 7 in) o/a
Beam	18.9 m (62 ft 0 in)
Draught	7.32 m (24 ft 0 in)
Propulsion	2 shaft Reciprocating Vertical Triple Expansion (VTE) Engines 8 boilers 13,500 shp (10,100 kW)
Speed	20 knots (23 mph; 37 km/h)
Range	7,000 nmi (13,000 km) at 10 kn (12 mph; 19 km/h)
Complement	600
Armament	1 × BL 10 inch gun Mk I – IV (Kasuga only) 4 × 20.3 cm/45 Type 41 naval guns (2 in Kasuga) 14 × 6-inch (152 mm) rapid fire guns 10 × 3-inch (76.2 mm) rapid fire guns 6 × QF 3 pounder Hotchkiss guns 2 × Maxim guns 4 × 457 mm (18 in) torpedo tubes
Armour	Main Belt: 70–150 mm (2.8–5.9 in) Deck: 25–38 mm (0.98–1.50 in) Barbette, Turret, Casemate & Conning tower: 100–150 mm (3.9–5.9 in)

The Kasuga-class cruiser (春日型巡洋艦, Kasuga-gata jun'yōkan) was a class of two armored cruisers of the Imperial Japanese Navy (IJN) based on the Giuseppe Garibaldi-class cruisers developed by Italy at the end of the 19th century.

The Italian Giuseppe Garibaldi-class design was a private venture by Gio. Ansaldo & C., which was hoping to profit from the need for the world's navies to modernize towards heavily armored steam warships. The design was so popular that between 1894 and 1902 ten cruisers were purchased by four different countries: The first five by the Italian Navy, four by the Argentine Navy and one by the Spanish Navy.

There is a disagreement in sources as to who originally ordered these ships. Conway's All the World's Fighting Ships states that they were ordered by the Italian Navy,^[1] while naval historian Robert Scheina writes that it was actually Argentina.^[2] In any case, Argentina originally planned to name them Mitre and Roca, then Rivadavia and Mariano Moreno, before they sold them to the Imperial Japanese Navy before final completion in 1904, where they were renamed the Kasuga and Nisshin.^[1]

Designed by Edoardo Masdea, the Garibaldi-class cruiser was a hybrid between a cruiser and a battleship. At 20 knots (37 km/h) maximum speed, the design was slightly slower than contemporary cruisers, but was very heavily armed and also heavily armored, in a package with very low displacement and moderate dimensions.

The class was unusual in that they did not have a uniform main armament. Some had single 10-inch (254 mm) guns in gun turrets fore and aft; others (including the Kasuga) had a mixed armament of a single 10-inch (254 mm) gun in one turret and another turret with twin 8-inch (203 mm) guns. A third variation (including Nisshin) was a uniform armament of four 8-inch (203 mm) guns, twin gun turrets fore and aft.

Kasuga was originally to be named Mitre but was renamed as Rivadavia by Argentina. She served in the Russo-Japanese War and took part in the Battle of the Yellow Sea and again at the Battle of Tsushima. After 1922, she was partially disarmed as part of the Washington Naval Treaty and used as a training ship. She was bombed and sunk by US Navy carrier aircraft at Yokosuka 18 July 1945, raised and scrapped in 1948.^[1]

Nisshin was originally to be named Roca but was renamed as Mariano Moreno by Argentina. She served in the Russo-Japanese War and was severely damaged during the Battle of the Yellow Sea and again at the Battle of Tsushima. After 1922, as part of the Washington Naval Treaty she was partially disarmed and used as a training ship. Nisshin was finally expended as a target and sunk in 1936.^[1]

The success of the Japanese Navy in using armored cruisers in the line of battle during the Russo-Japanese War of 1905 drew considerable attention from navies and ship designers worldwide. The armored cruiser design soon evolved into the dreadnought armored cruiser, which became known as the battlecruiser.

• Chesneau, Roger (1979). Conway's All the World's Fighting Ships 1860–1905. Conway Maritime Press. ISBN 0-85177-133-5.
• Evans, David C.; Peattie, Mark R. (1997). Kaigun: Strategy, Tactics, and Technology in the Imperial Japanese Navy, 1887-1941. Annapolis, MD: Naval Institute Press. ISBN 0-87021-192-7.
• Gardiner, Robert (editor) (2001) Steam, Steel and Shellfire, The Steam Warship 1815–1905, ISBN 0-7858-1413-2
• Howarth, Stephen (1983). The Fighting Ships of the Rising Sun: The Drama of the Imperial Japanese Navy, 1895-1945. Atheneum. ISBN 0-689-11402-8.
• Jane, Fred T. (1904). The Imperial Japanese Navy. Thacker, Spink & Co.
• Jentsura, Hansgeorg (1976). Warships of the Imperial Japanese Navy, 1869-1945. Annapolis, MD: Naval Institute Press. ISBN 0-87021-893-X.
• Kofman, V.L. Armored Cruiser Type Garibaldi, Morskaya Kollektsia 3-1995
• Roberts, John (ed). (1983). 'Warships of the world from 1860 to 1905 - Volume 2: United States, Japan and Russia. Bernard & Graefe Verlag, Koblenz. ISBN 3-7637-5403-2.
• Schencking, J. Charles (2005). Making Waves: Politics, Propaganda, And The Emergence Of The Imperial Japanese Navy, 1868-1922. Stanford University Press. ISBN 0-8047-4977-9.
• Scheina, Robert (1987). Latin America: A Naval History, 1810–1987. Annapolis, MD: Naval Institute Press. ISBN 0-87021-295-8. OCLC 15696006.

• Yabuki, Hiraku (2009). "Britain and the Resale of Argentine Cruisers to Japan before the Russo-Japanese War". War in History. 16 (4): 425–446. doi:10.1177/0968344509341685. ISSN 0968-3445. JSTOR 26070652. S2CID 159780870.

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