a similar process is also documented in mr. naka's first book.
in hans' defence he did not coin the name, is quick to point that out & gives credit where it is due. he has also refined it through practice, brought it to the attention of the contemporary community and managed, with those clear simple drawings, to make it accessible to anyone with a steady hand and a bit of nerve.
i used the technique on two large ficus cuts earlier this year & plan to do so again with some tamarack come spring. the jury is still out on my results, but if things fail I'll be inclined to blame my application of the technique rather than the technique itself.
i've followed hans' work through the progressions on his blog for some time. it speaks for itself & compels me to pay attention when he's willing to share his knowledge.