History
Empire of Japan
Name	CH-22
Builder	Mitsubishi Heavy Industries, Yokohama
Launched	29 May 1941
Completed	12 October 1941
Fate	Sunk, 19 February 1944
General characteristics
Class and type	No.13-class submarine chaser
Displacement	438 long tons (445 t) standard
Length	51 m (167 ft 4 in) o/a
Beam	6.7 m (22 ft 0 in)
Draught	2.75 m (9 ft 0 in)
Propulsion	2 × Kampon Mk.23A Model 8 diesels, 2 shafts, 1,700 bhp (1,268 kW)
Speed	16 knots (30 km/h; 18 mph)
Range	2,000 nmi (3,700 km) at 14 kn (26 km/h; 16 mph)
Complement	68
Sensors and processing systems	1 × Type 93 active sonar 1 × Type 93 hydrophone
Armament	1 × 76.2 mm (3 in) L/40 AA gun 2 × Type 93 13.2 mm (0.52 in) AA guns 36 × Type 95 depth charges 2 × Type 94 depth charge projectors 1 × depth charge thrower

The Japanese submarine chaser CH-22 was a No.13-class submarine chaser of the Imperial Japanese Navy during World War II. She was built by Mitsubishi Heavy Industries, Yokohama, launched on 29 May 1941 and completed on 12 October 1941. On 24 August 1942, she left Rabaul as part of Operation RE, for the landings at Milne Bay.

Fate

On 19 February 1944, while off Kavieng, New Ireland in Convoy O-902, she was attacked by United States Army Air Forces B-25's of the 500th and 501st Bombardment Squadrons, A-20's of the 3rd Bombardment Group and P-38's and was sunk at 03°04′S 150°42′E / 3.067°S 150.700°E / -3.067; 150.700.