Ibuki-class cruiser

Ibuki being scrapped in drydock, 14 March 1947
Class overview
Name:	Ibuki class
Operators:	Imperial Japanese Navy
Preceded by:	Tone class
Succeeded by:	None
Cost:	¥60,000,000
Built:	1942–45
Planned:	2
Completed:	0
Scrapped:	2
General characteristics (as designed)
Type:	Heavy cruiser
Displacement:	12,220 t (12,030 long tons) (standard) 14,828 t (14,594 long tons) (full load)
Length:	200.6 m (658 ft 2 in)
Beam:	20.2 m (66 ft 3 in)
Draft:	6.04 m (19 ft 10 in)
Installed power:	152,000 shp (113,000 kW) 8 × water-tube boilers
Propulsion:	4 × shafts 4 × geared steam turbine sets
Speed:	35 knots (65 km/h; 40 mph)
Range:	6,300 nmi (11,700 km; 7,200 mi) at 18 knots (33 km/h; 21 mph)
Complement:	876
Sensors and processing systems:	1 × Type 2, Mark 2, Model 1 air search radar 1 × Type 93 hydrophone system
Armament:	5 × 2 - 20 cm 3rd Year Type No. 2 guns 4 × 2 - 12.7 cm Type 89 anti-aircraft (AA) guns 4 × 2 - Type 96 25 mm AA guns 2 × 2 - 13.2 mm Type 93 machine guns 4 × 4 - 61 cm (24 in) torpedo tubes
Armor:	Waterline belt: 30–140 mm (1.2–5.5 in) Deck: 35–60 mm (1.4–2.4 in) Gun turrets: 25 mm (1 in) Barbettes: 25–100 mm (1.0–3.9 in) Conning tower: 100 mm
Aircraft carried:	3
Aviation facilities:	2 aircraft catapults

The Ibuki-class (伊吹型, Ibuki-gata^?) cruisers were the last class of heavy cruisers built for the Imperial Japanese Navy (IJN). In order to save design time, the ships were essentially repeats of the earlier Mogami class. Begun during World War II, only the lead ship, Ibuki, was launched, but was in the process of being converted into a light aircraft carrier when construction was suspended in 1945. She was scrapped beginning in 1946. The unnamed second ship was scrapped less than a month after being laid down in order to clear her slipway for an aircraft carrier.

The design of the Ibuki class was a minor improvement over the last pair of the Mogami class after those ships had been upgraded during the late 1930s. The main improvement was the replacement of the triple torpedo tube mounts in the older ships with quadruple mounts. They cost 60,000,000 yen each and had a crew of 54 officers and 822 enlisted men.

The ships had a length of 200.6 meters (658 ft 2 in) overall. They had a beam of 20.2 meters (66 ft 3 in) and a draft of 6.04 meters (19 ft 10 in). They displaced 12,220 metric tons (12,030 long tons) at standard load and 14,828 metric tons (14,594 long tons) at (full load).