The Nakajima E4N was a Japanese shipboard reconnaissance aircraft of the 1930s. It was a two-seat, single-engine, equal-span biplane seaplane used primarily by the Imperial Japanese Navy.
The Kawanishi H3K, also known as Navy Type 90-2 Flying Boat (九〇式二号飛行艇), was a Japanese biplane military flying boat from the interwar period. The H3K was a development of the Short S.8/8 Rangoon. The first of the H3Ks was built by Short Brothers and the remaining four by Kawanishi in Japan.
The Heinkel HD 25 was a two-seat shipboard biplane reconnaissance floatplane developed in Germany during the 1920s for production in Japan.
The Heinkel HD 26 was a reconnaissance seaplane developed in Germany during the 1920s for production in Japan. It was intended as a smaller, single-seat counterpart to the HD 25, to provide a spotter aircraft for warships, to take off from a short ramp. The HD 26 was a conventional biplane with staggered wings, twin float undercarriage, and an open cockpit.
The Aichi E3A was a reconnaissance seaplane developed in Germany as the Heinkel HD 56 to operate from warships of the Imperial Japanese Navy, which designated it the Type 90-1 Reconnaissance Seaplane. It was a conventional single-bay biplane with staggered wings braced by N-type interplane struts. The pilot and gunner sat in tandem, open cockpits.
The Aichi E10A was a Japanese night reconnaissance flying boat of the 1930s. A single-engined biplane, 15 were built for the Imperial Japanese Navy as the Type 96 Night Reconnaissance Seaplane, serving from 1936 but were retired in 1941 before the Attack on Pearl Harbor.
The Hiro H2H, or "Navy Type 89 Flying boat", was a Japanese patrol flying boat of the 1930s. Designed and built by the Hiro Naval Arsenal, it was a twin-engined biplane that was operated by the Imperial Japanese Navy.
The Yokosuka Ro-go Ko-gata was a Japanese reconnaissance floatplane developed during the First World War by the Japanese Navy Arsenal at Yokosuka, and one of the first indigenous Japanese aircraft to enter production. There were 218 of these aircraft built for the Imperial Japanese Navy, which remained in use until 1928.
The Aichi AB-3 was a Japanese ship-board reconnaissance floatplane of the 1930s. The AB-3, a single-seat, single-engined biplane, was designed to equip a light cruiser Ning Hai being built in Japan for the Chinese navy, a single aircraft being accepted by the Chinese.
The Kawanishi E11K was a Japanese flying boat of the 1930s. It was designed as a night reconnaissance aircraft for the Imperial Japanese Navy, but was not accepted, the two aircraft built being used as transports as the Type 96 Transport Flying Boat during the Second World War.
The Aichi AB-6, or Aichi Experimental 7-Shi Reconnaissance Seaplane, was a prototype Japanese reconnaissance floatplane. It was a single-engined, three-seat biplane intended for the Imperial Japanese Navy, but only one was built, the rival aircraft from Kawanishi, the E7K being preferred.
The Aichi F1A was a prototype Japanese floatplane of the 1930s. A single-engined biplane, the F1A was intended as a short-range observation aircraft suitable for operation off the Imperial Japanese navy's warships, but only two were built, the Mitsubishi F1M being selected instead.
The Aichi E8A was a prototype Japanese reconnaissance floatplane of the 1930s. It was a two-seat single engined biplane built for the Imperial Japanese Navy. Only two were built.
The Aichi AB-2 was a prototype Japanese reconnaissance floatplane of the 1930s. It was a single-engined biplane, of which two examples were built, but no production followed.
The Kawanishi E10K, also known as Kawanishi Type T, Kawanishi Navy Type 94 Transport Seaplane and Kawanishi Navy Experimental 9-Shi Night Reconnaissance Seaplane, was a small Japanese flying boat of the 1930s. It was a single-engined biplane intended to meet a requirement for a night reconnaissance aircraft for the Imperial Japanese Navy, but was not selected for production, the single prototype being converted to a transport and operated as the Navy Type 94 Transport.
The Mitsubishi Ka-8 or Mitsubishi Experimental 8-Shi Two-seat Fighter was a prototype Japanese two-seat carrier-based fighter aircraft of the 1930s. Two were built, but no production followed.
The Nakajima D3N was a Japanese carrier-based dive bomber of the 1930s. Three prototypes were built for the Imperial Japanese Navy, but no production followed, with the Aichi D3A being selected instead.
The Kawanishi K8K was a Japanese floatplane trainer designed and built by the Kawanishi Aircraft Company for the Imperial Japanese Navy. It was selected for production, but only a small number were built before a change in the Japanese Navy's training needs led to production being stopped.
The Kawanishi E13K, company designation AM-19, was a Japanese 1930s three-seat reconnaissance floatplane.
The Watanabe K8W was a Japanese floatplane trainer designed and built by Watanabe for the Imperial Japanese Navy.
