While neat its certainly NOT a discovery since its "ALREADY" in a book from 2004. Some japanese girl/guy who bought the book and could understand japanese Looooong ago most likely already did this what 9 years ago? The only thing the person gets credit for is pointing it out to non japanese who missed out because they cant speak that language aka cant read the book. I also wouldnt be surprised if someone already did a video long ago on nicovideo (again japanese person).