Some years ago in Japan I was presented with a book entitled ” The X planes of Imperial Japanese Army and Navy 1924-45″ It was no 8 of a series “Illustrated Warplane History” Copyright Shigeru Nohara .Green Arrow ISBN4-7663-3292-X Profusely illustrated with photographs, 3 -views and often detailed structural drawings of well over 200 types.Unfortunately of course most of the text is in Japanese but the main titles are also in English. It contains masses of data that I have not seen published elsewhere.