Yokosuka E14Y

The Yokosuka E14Y was an Imperial Japanese Navy reconnaissance seaplane transported aboard and launched from Japanese submarine aircraft carriers such as the I-25 during World War II.

The Japanese Navy designation was, Type 0 Small Reconnaissance Seaplane.

The E14Y was used for several Japanese reconnaissance missions during the Pacific War.

On 26 February 1942 the Japanese submarine I-25, under the command of Captain Akiji Tagami, was off the northern tip of King Island in Bass Strait off the coast of Victoria, Australia, when an E14Y was launched on a reconnaissance flight over the Port of Melbourne.

The pilot and observer/gunner were in the air for three hours, during which time they successfully flew over Port Phillip Bay and observed the ships at anchor off Melbourne before returning to land on its floats beside the submarine, where it was winched aboard and disassembled.

The E14Y is the only Japanese aircraft to overfly New Zealand during World War II.

On 8 March 1942 Warrant Officer Nobuo Fujita photographed the Allied build-up in Wellington harbour in a “Glen” launched from the Japanese submarine I-25.

On 13 March he flew over Auckland, before the I-25 proceeded to Australia.

On the night of 24/25 May Warrant Officer Susumo Ito flew a “Glen” over Auckland from the Japanese submarine I-21.

Just days later, in the same aircraft, Ito flew the reconnaissance flight preceding the sole Japanese attack on Sydney Harbour in which 21 seamen were killed when HMAS Kuttabul sank on 1 June 1942.

Type A1 submarine I-9 was caught off the New Zealand coast in early 1943; however, no Japanese aircraft was observed, and any records of overflights were lost when the submarine was sunk.

The E14Y also has the distinction of being the only submarine-based aircraft to drop bombs on the United States during World War II, in an incident known as The Lookout Air Raid.

On 9 September 1942, Chief Warrant Officer Nobuo Fujita, a pilot in the Japanese Imperial Navy, and his crewman, Petty Officer Shoji Okuda, surfaced in submarine I-25 off the coast of Oregon near Brookings.

The seaplane had folding wings and was transported in a watertight capsule attached to the deck of the submarine.

The bombs – 76 kg (168 lb) incendiaries intended to cause forest fires – caused no injuries or real damage.

A total of 126 E14Ys were produced.





8.54 m (28 ft 0 in)


11 m (36 ft 1 in)


3.8 m (12 ft 6 in)

Wing area

19 m2 (200 sq ft)

Empty weight

1,119 kg (2,467 lb)

Gross weight

1,450 kg (3,197 lb)

Max take-off weight

1,600 kg (3,527 lb)


1 × Hitachi GK2 Tempu 12,

9-cylinder air-cooled radial piston engine,

250 kW (340 hp) for take-off

224 kW (300 hp) at sea level


2-bladed wooden propeller


Maximum speed

246 km/h (153 mph, 133 kn) at sea level

Cruise speed

167 km/h (104 mph, 90 kn) at 1,000 m (3,281 ft)


881 km (547 mi, 476 nmi)

Service ceiling

5,240 m (17,190 ft)

Time to altitude

3,000 m (9,843 ft) in 10 minutes 11 seconds

Wing loading

76.3 kg/m2 (15.6 lb/sq ft)


0.1749 kW/kg (0.1064 hp/lb)



1× flexible, rearward-firing 7.7 mm (0.303 in) Type 92 machine gun for the observer


2× 76 kg (168 lb) bombs (various).


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