I-351-class submarine

	I-352 on 23 January 1948
Class overview
Name	I-351-class submarine
Builders	Kure Naval Arsenal
Operators	Imperial Japanese Navy
Built	1943–1945
In commission	1945
Planned	6
Completed	1
Cancelled	4
Lost	2
General characteristics
Type	Tanker/transport submarine
Displacement	3,512 long tons (3,568 t) surfaced; 4,290 long tons (4,359 t) submerged;
Length	111.00 m (364 ft 2 in) (overall)
Beam	10.2 m (33 ft 6 in)
Draft	6.1 m (20 ft 0 in)
Installed power	2 × diesel engines (3,700 bhp (2,800 kW)); 2 × electric motors (1,200 shp (890 kW));
Propulsion	2 × propeller shafts; Diesel-electric;
Speed	15.75 knots (29.17 km/h; 18.12 mph) (surfaced); 6.3 knots (11.7 km/h; 7.2 mph) (submerged);
Range	13,000 nmi (24,000 km; 15,000 mi) at 14 knots (26 km/h; 16 mph) (surfaced); 100 nmi (190 km; 120 mi) at 3 knots (5.6 km/h; 3.5 mph) (submerged);
Test depth	90 m (300 ft)
Complement	77 + 13 aircrew
Armament	4 × bow 21-inch (533 mm) torpedo tubes; (4 torpedoes); 3 × 81 mm (3.2 in) Type 3 mortars; 7 × 25 mm (1 in) Type 96 AA guns;

The I-351-class submarine (伊三百五十一型潜水艦, I-san-byaku-go-jū-ichi-gata sensuikan) was a class of tanker/transport submarines built for the Imperial Japanese Navy (IJN) during World War II. The IJN called this type of submarine Senho type submarine (潜補型潜水艦, Sen-Ho-gata sensuikan). The type name, was shortened to Hokyū Sensuikan (補給潜水艦, Submarine Tanker). The IJN designed these submarines to support flying boats in forward areas. By the time the first submarine was finished, this capability was no longer needed and she was converted into a tanker. That boat, I-351, was sunk on the return leg of her second voyage in 1945; the second boat, I-352, was destroyed by an American air raid before she was completed. Four additional submarines were planned, but were cancelled before they were laid down.

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