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 Maru Mechanic series contains extensive technical illustrations and diagrams of the internal and external structure of the aircraft covered. Numerous wartime photos, too. An absolutely incredible book. Covers all the possible details of the aircraft covered. You name it and it is in this book. Variants are also shown. Every mechanism from the hook to the engine mounts is broken down in detail. About 160 pages. No English text.