Aichi D1A

The Aichi D1A was a Japanese carrier-based dive bomber. It was created as the Imperial Japanese Navy needed an advanced carrier-bomber and therefore, in 1934 they prompted Aichi to finish their AB-9 design, which had already one prototype into service, the D1A1.
It was designed by the German Ernst Heinkel who worked on request of Aichi. Initially it was highly based on the Heinkel He.50 but it was equipped with floaters instead of a fixed landing gear, however, the prototype of the very next model, the Heinkel He.66 was sold to Aichi which they manufactured it as the Aichi D1A1.
As it was based on the export model of the Heinkel He.50, (the He.66) it was a metallic biplane with a fabric covering, a fixed landing gear and a conventional tail landind skid. Initially they were powered by either 490hp or 580hp engines but it wasn't until the second model, the D1A2 came that it was powered by the more powerful 730hp Nakajima Hikari radial engine. It had an offensive armament of two 7.7mm type 92 machine guns plus one defensive 7.7mm type 92 one. It could also carry one 250 bomb under the fuselage and 2 30kg bombs under the wings.
They mainly were used from the Second Sino-Japanese War of 1937 until Japan entered the World War 2 in December 1941. At the beginning of the Pacific War all D1A1 models were decommissioned and the remaining D1A2 were retired from the frontlines and used as advanced bomber trainers. There is, however, one exception because some of them were still being used as second-line support bombers until 1942 in mainland China. After most of them were retired they were handed to the Manchukuo's coast guard where they served most probably until the end of the war.

Sources:
1. https://en.wikipedia.org/wiki/Aichi_D1A
2. http://www.aviastar.org/air/japan/aichi_d1a.php