A small adition; it belongs to the Kasumigaura Kokutai. Notice that the engine area and possibly the floats too, are painted in different colors than the fuselage. Very difficult even to speculate but gray for the fuselage, some short of yellow for the cowling and NMF for the floats are not entirely impossible.
Any thoughts?
Photo from the album "KOKU HATATSU SHI" (History of the Aviation progress), Shinbun Shogo Tsushinsha pubs. Showa 7 (1933).
Scroll lower for a close up of the seaplane in the background.
This photo also from the album "KOKU HATATSU SHI" (History of the Aviation progress), Shinbun Shogo Tsushinsha pubs. Showa 7 (1933).
A Hansa-Brandenburg W-29 was received by Japan as war reparations after the end of WWI. The type was considered very advanced and Nakajima and Aichi started its production building a total of 310. Although all references state that it had a two blade wooden propeller, in this photo as well as in the photo of page 272 of "Japanese A/C 1910-1941" it seems as if the propeller has four blades. This plane also belongs to the Kasumigaura Kokutai and notice that unlike the above seaplane it has a white ring Hinomaru. The fuselage looks like it's painted in a darker color. Orange?
