Thanks for the replies and ideas. A few of what you all mentioned I will include: who was eligible for medals, how many of each were minted (I hope to get official numbers on each war and commemorative medal), case inscription history (if I can find official documentation), and assorted oddities of medals, like how much each medal, ribbon, case, etc cost the gov't to produce (yes, I have those numbers!). Richard, if you are interested in post-war medals, the official numbers of each class of decoration have been published--as well as the names and addresses of each recipient! There are heavy tomes dedicated to this. Similar books exist for merit medals. These all date from 1964 (the year medals began being awarded again) so pre-war info is not readily available. I think the older info was kept in the official Mint rolls, which allegedly were destroyed during the WW2 firebombing.
Dieter, you are expecting some answers that may never be found. I think minor variations of medals (like a rounded suspension bar) were not duly recorded. Each Imperial Rescript (all of which I'll include in my book) details what the different parts of the medal looked like, but I think smaller variants were just done on the fly. I'll keep looking, though. And as for mintmarks, well, I'd love to solve that mystery. I'm not sure I can, but it is one of the topics I've placed under my HARD TO DO heading. Still, I have lots of stuff to read and translate here, so it is possible.
Claudius, I don't think foreigners were held to a different standard for the decorations and medals. And I wouldn't think there would be a separate list for them, but since there is currently a separate ceremony for awards to foreigners, perhaps I'll find something.
Jeff, I'll keep my eyes open for Chinese medal info. I cannot read Chinese well, so I am limited to my Japanese sources.
The book is really aimed at all medal enthusiasts. Along with the obligatory history of Japanese decorations, I'll have all the rescripts (as mentioned), details of ceremonies, details on making of medals and documents, various stories about recipients, military badges--oh, the list goes on. I hope to back up everything with primary & secondary documentation so the source will be authoritative. Well, if I mean to do well, I guess I shouldn't be writing such long posts. Thanks for your comments and if you have any other questions, please post them. I'll jot them down in my notebook and get to work.
Cheers,
Rich