Heh heh. So this is a Japanese RPG book, called a TRPG for 'tabletalk', as 'RPG' in Japanese is used almost exclusively for the videogame type.
This here is a special one. This is the official MS Gundam RPG, using R. Talsorian Games Mekton Z rules. RTG, for those that don't know, was the company behind Cyberpunk 2020, my very favorite RPG. Mekton Z (pronounced 'zeta'), and thus Gundam Senki here, use the same system, Interlok.
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So, the book is in Japanese of course, and rather difficult language (political, military, and gaming terms abound), but I now have official write-ups of the characters and mecha from the year one war! See, there's Amuro!
The book itself is about B4 sized and a very Japanese dust-jacketed softback. 336 pages, 123 pages of setting, 50 of rules, and the balance of NPC and mecha stats!