Japanese submarine I-55 (1925)

	I-55 in harbor in 1930.
History
Empire of Japan
Name	Submarine No. 78
Builder	Kure Naval Arsenal, Kure, Japan
Laid down	1 April 1924
Renamed	I-55 on 1 November 1924
Launched	2 September 1925
Completed	5 September 1927
Commissioned	5 September 1927
Decommissioned	10 February 1932 (possibly; see text)
Recommissioned	20 February 1934 (possibly; see text)
Decommissioned	31 July 1936
Recommissioned	1 December 1936
Renamed	I-155 on 20 May 1942
Decommissioned	20 July 1945
Recommissioned	early August 1945
Fate	Surrendered September 1945; Stricken 20 November 1945; Scuttled 8 May 1946;
General characteristics
Class and type	Kaidai-class submarine (KD3A Type)
Displacement	1,829 t (1,800 long tons) surfaced; 2,337 t (2,300 long tons) submerged;
Length	100 m (328 ft 1 in)
Beam	8 m (26 ft 3 in)
Draft	4.82 m (15 ft 10 in)
Installed power	6,800 bhp (5,100 kW) (diesels); 1,800 hp (1,300 kW) (electric motors);
Propulsion	Diesel-electric; 2 × diesel engines; 2 × electric motors;
Speed	20 knots (37 km/h; 23 mph) surfaced; 8 knots (15 km/h; 9.2 mph) submerged;
Range	10,000 nmi (19,000 km; 12,000 mi) at 10 knots (19 km/h; 12 mph) surfaced; 90 nmi (170 km; 100 mi) at 3 knots (5.6 km/h; 3.5 mph) submerged;
Test depth	60 m (197 ft)
Complement	60
Armament	8 × 533 mm (21 in) torpedo tubes (6 bow, 2 stern); 1 × 120 mm (4.7 in) deck gun (removed April 1945); 2 x kaiten (added April 1945);

I-55, later renumbered I-155 (伊号第五五潜水艦, I-gō Dai-Hyaku-gojūgosensuikan), was an Imperial Japanese Navy Kaidai-class cruiser submarine of the KD3A sub-class commissioned in 1927. Early in World War II, she supported Japanese forces in the invasion of Malaya and the Dutch East Indies campaign before assuming training duties in Japan, interrupted briefly in 1943 by her participation in the Aleutian Islands campaign. She became a kaiten manned suicide attack torpedo carrier in 1945 before surrendering at the end of the war. She was scuttled in 1946.

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