I wish I could write two reviews - one for the Kindle version and one for the hard copy.
I initially purchased the kindle version of the book, and right off the bat I had difficulty reading it. This isn't really an e-book where you can control the size of the text to make words more legible. The kindle version is simply scanned images of the book's pages that have been sequenced together.
The scans themselves are small - the "native" scan size occupies half my iPad screen. So in order to read just about everything other than the intro (which is in a typewriter-style font), you have to pinch and zoom. Unfortunately, when you zoom in, you discover that the resolution of the scanned page is not very high, and therefore the text is pixilated. The text/notes within the sketches are hand-written (in some cases, cursive),and therefore the notes are quite difficult to read (and in a of couple cases for me, impossible to read. I don't understand why the scan resolution is so low - the hard copy is larger than the screen of my iPad.
In addition, since you need to zoom in, reading through the book is cumbersome: Zoom in, swipe page around the screen to see everything, zoom out, then move to the next page.
So I returned the kindle version and ordered a hard copy. As always, Amazon was outstanding with handling this.
The hard copy is FANTASTIC - I would give it five stars. It is something I would bring back from Japan as a souvenir if I found it in a Tokyo bookstore.
But I have to give the kindle version a one-star rating because of the low scan resolution and the cumbersome nature of reading the book.