Judging by the one and five star reviews below me this is a "love it or hate it" kind of book. I love it, while admitting its drawbacks.
Originally written in 1962 by trainers from the Kodokan in Tokyo, its purpose was to catalog the traditional calisthenic exercises of judo and promote the then-radical use of modern western free weights. Part one is theory, part two is practice.
The books only flaw is its age. Looking at the pictures, one feels like Jerry Seinfeld when Lloyd Bridges decided to whip him into shape: "It's like a fitness museum!" Some exercises are pictured employing such unfashionable devices as rubber expanders and one-piece barbells of the sort that circus strongmen always use. Scrupulously up-to-date people will no doubt find some of it pretty funny, and the looks one would get at the gym when doing, say, reverse running on all fours would be funnier still.
Never the less, the book is packed solid with explanations and photos of hundreds of damn good exercises and lots of fairly good training information, all of it presented from a perspective of what is useful for judo. If supplemented by some common sense and maybe a book on gym safety it is quite valuable.