Japanese submarine I-56 (1943)

I-56 anchored off Ōtsu on 21 December 1944
History
Japan
Name	Submarine No. 629
Builder	Yokosuka Naval Arsenal, Yokosuka, Japan
Laid down	29 September 1942
Renamed	I-56 on 12 June 1943
Launched	30 June 1943
Completed	8 June 1944
Commissioned	8 June 1944
Fate	Missing April 1945
Stricken	10 June 1945
General characteristics
Class and type	Type B3 submarine
Displacement	2,140 long tons (2,174 t) surfaced 3,688 long tons (3,747 t) submerged
Length	108.7 m (357 ft)
Beam	9.3 m (31 ft)
Draft	5.19 m (17.0 ft)
Propulsion	2 × Kampon Mk.22 diesel engines, 4,700 hp (3,500 kW) 2 × Electric motors, 1,200 hp (890 kW)
Speed	17.7 knots (33 km/h) surfaced 6.5 knots (12 km/h) submerged
Range	21,000 nmi (39,000 km) at 16 kn (30 km/h; 18 mph) surfaced 105 nmi (194 km) at 3 kn (5.6 km/h; 3.5 mph) submerged
Test depth	100 m (328 ft)
Complement	94 officers and men
Armament	6 × 533 mm (21 in) torpedo tubes 19 × Type 95 torpedoes 2 × Type 96 25 mm (0.98 in) AA guns
Aircraft carried	1 × floatplane (removed February–March 1945)
Aviation facilities	Hangar and catapult (removed February–March 1945)

The second I-56 was an Imperial Japanese Navy Type B3 submarine. Completed and commissioned in June 1944, she served in the late stages of World War II and took part in the Philippines campaign at the time of the Battle of Leyte Gulf. She then operated as a kaiten torpedo carrier, including during the Battle of Okinawa, before she was lost in April 1945.