Japanese submarine I-8

I-8 entering Kagoshima Bay on the coast of Japan on 12 September 1939.
History
Empire of Japan
Name	I-8
Builder	Kawasaki, Kobe, Japan
Laid down	11 October 1934
Launched	20 July 1936
Completed	5 December 1938
Fate	Sunk 31 March 1945
General characteristics
Class and type	Junsen-class J3 Type submarine
Displacement	2,525 long tons (2,566 t) surfaced 3,583 long tons (3,640 t) submerged
Length	358.5 ft 6 in (109.42 m)
Beam	29 ft 8 in (9.04 m)
Draft	17 ft 3 in (5.26 m)
Propulsion	Diesel-electric 2 diesel engines, 11,200 hp (8,400 kW) (surfaced) Electric motors, 2,800 hp (2,100 kW) (submerged)
Speed	23 knots (43 km/h; 26 mph) (surfaced) 8 knots (15 km/h; 9.2 mph) (submerged)
Range	14,000 nmi (26,000 km) at 16 knots (30 km/h; 18 mph)
Test depth	100 m (330 ft)
Complement	100 officers and men
Armament	1 × twin 14 cm/40 11th Year Type naval gun[1] 2 × Type 96 25 mm (0.98 in) AA guns 6 × 533 mm (21.0 in) forward torpedo tubes 21 torpedoes Kaiten fittings (added 1944–1945)
Aircraft carried	1 × Yokosuka E14Y seaplane (removed 1944)
Aviation facilities	1 x aircraft catapult (removed 1944) 1 x hangar (removed 1944)

I-8 was an Imperial Japanese Navy Junsen III (or J3)-type submarine commissioned in 1938 that served during World War II. Designed as submarine aircraft carriers, I-8 and her sister ship I-7 were the largest Japanese submarines to be completed before the outbreak of the war in the Pacific in 1941. With embarked floatplanes, I-8 participated in operations related to the attack on Pearl Harbor, patrolled off the United States West Coast, and took part in the Guadalcanal campaign and the Okinawa campaign.

In 1943, I-8 completed a technology exchange mission with a voyage to German-occupied France and back to Japan, the only submarine to complete a round-trip voyage between Japan and Europe during World War II. Under a new commanding officer in 1944, her crew committed war crimes during anti-shipping operations in the Indian Ocean. She was sunk in 1945.