This is a Japanese-language book or magazine about aircraft and/or aircraft modeling. Some Japanese aircraft books, such as the Aero Detail series contain complete English text as well. See the product description below for details.
The "Mechanism of Military Aircraft" series by Kojinsha is a reprinting of their acclaimed "Maru Mechanic" series in a smaller, soft-cover format. Each volume contains hundreds of detailed technical illustrations, manual reprints, photos and drawings of the aircraft, showing off the inner mechanism better than almost any other aircraft reference work we've seen. Numerous technical essays as well, but these and all text and captions in these books are completely in Japanese. Soft-cover w/dust jacket. 21 x 15cm format.