I am not sure why I bought this book since I do not sew anymore (arthritis) and I do not particularly like to look at or to wear modern Japanese clothing. The cover caught my eye, I guess. I have always been curious about the structure of some of the more complicated Japanese designs. This is an amazing book. The clothing is amazing, if largely unwearable, but could be the springboard for your own interesting designs. Many of the ideas could be adapted to Western clothing.
Even though I have 60 years sewing experience and a tech degree in pattern design, I don't think that I could readily draft or adapt any of the patterns, not to mention making most of them. While there is ample information about drafting the pattern, there is no instruction about sewing the garment, appropriate understructure, interfacing etc. The notation on the patterns is a little different that what I was taught so I found it a little confusing. One generally needs to sew a complicated garment in a specific sequence that is not given in the book. If one is going to make the dress on page 55, for example, out of a "soft woolen georgette", one is going to need to underline and interline. That is not mentioned. I suppose a seasoned pro would know. Have plenty of muslin on hand if you try these garments.
The book is not for beginners. If you are very experienced with pattern drafting and sewing, go for it. If you are not, buy the book and admire the skill and ingenuity that has gone into drafting these patterns and making these garments. I would call this a sewing equivalent of a beautiful coffee table book, hardly practical but very interesting and, perhaps, inspirational. Four stars for the inspiration. While I know that pattern books rarely mention these things, I subtracted a star for the lack of information regarding structure and construction since these designs are so very complex.