It is an excellent source of the foundational principles and practices of the very thorough system of Danzan Ryu Jujitsu. If you want to learn about Jujitsu for the first time this is a great starting point. If you want to hone your existing skills this is also the book for you. Over 900 illustrations bring the lessons to life. He just lays out the techniques, and that's it.
Inset pictures show grips for clarity.
Not crystal clear, but with any training you get it. It discusses the history, theory, philosophy and techniques of aikijujutsu and Japanese martial arts in a well-written, intelligent and even scholarly way. It actually offers more in its descriptions of martial techniques than the all too typical, Now I move my right foot forward . . . The author provides extremely detailed and clear descriptions of how to perform the large number of techniques depicted in this book. Far too many martial arts books only describe what is obviously taking place in the photos, which is just that obvious.