Ki-21 "Sally" bombers over SE Asia landscape
Jerry Boucher very kindly sent me this link to an article by E.M. Sanchez-Saavedraon on the Yesterday's Papers blog featuring wartime Japanese postcards, some of which depict aviation subjects. There is also a wonderful collection of wartime Japanese picture books catalogued online at Kokugakuin University. An excellent feature of the site is that each page of each book can be opened individually as a very large size image. The site is all in Japanese text but navigation is fairly intuitive and there is much of interest to explore there. Note especially the depiction of the Japanese Army ash green colour (Hairyokushoku - 灰緑色) in many of the paintings.
Nakajima Ki-21 "Sally" bombers under attack by Chinese biplane fighters
Ki-30 "Ann" crews briefing before mission
Ki-48 "Lily" bombers attack in moonlight
And whilst on the subject of Japanese military postcards and paintings I can heartily recommend 'A Postcard History of Japanese Aviation: 1910-1945' by Edward M Young (Schiffer Publishing Ltd., 2012). It is an excellent and comprehensive study with many fascinating contemporary images in colour. To any web-image satiated enthusiasts who think there is going to be nothing new to see in this book - think again! There are some absolute gems and the book is a delight to browse and to own.
Image credits: Postcard images via Yesterday's Papers; Painting images © Kokugakuin University via website; Book cover © 2012 Schiffer Publishing Ltd.)