Imai completely rewrote the instruction book, with better drawings and corrections to the many errors.
It's a staple bound booklet on glassy magazine stock with some four color images.
It's like comparing the supermarket ad supplements in the paper to a copy of Scientific American.
Even though the text is Japanese, the drawings and steps shown are completely understandable.
Now I come from the days of the old Frog kits with a single "exploded" view, but still.