Nakajima E4N2 ship-borne reconnaissance floatplane, military recruitment postcard, c. 1935.

See also:
Nakajima E8N, “Dave”, c. 1935-45.

“The Nakajima E4N was a Japanese shipboard reconnaissance aircraft of the 1930s that went through two very different designs before entering service with the Imperial Japanese Navy during the 1930s.

“The Nakajima designs was influenced by the U.S. manufactured Vought O2U Corsair, a scout-observation biplane for which Nakajima had gained a licence to reproduce the design. As finally manufactured, the Nakajima E4N2 was a two-seat, single-engine, equal-span biplane seaplane employed primarily as a shipboard reconnaissance seaplane launched by catapult.

“In 1933, nine E4N2-C airframes were converted to Nakajima P1 night air mail planes. Single-seat land-planes with an enclosed cockpit, these were employed on night-mail services between the Japanese Home Islands.

“The standard night mail route connected Tokyo, Osaka and Fukuoka and began operations in August 1933. Though this service was successful in the sense of increasing mail volume it showed that these night flights were stressful for a single pilot in a single-engined aircraft, especially in bad weather.”

– Wikipedia

Nakajima E4N2 Performance

Maximum speed: 232 km/h (144 mph, 125 kn)
Cruise speed: 148 km/h (92 mph, 80 kn)
Range: 1,019 km (633 mi, 550 nmi)
Service ceiling: 5,740 m (18,830 ft)