Kano's two kids - JuDo and Godo?

http://www.godoinfo.com

At first I questioned this site's contents on my mind but then I remembr seeing a book with the GoDo characters and symbol (and a ncie skull and crossbones) on a book at my local Kinokuniya bookstore. Is this art really that rare if its documented in a book sold at a major Jaapnese retail book chain? Also, why is it GoDo and not GoJitsu? Don't -Do styles usually absolve the killing intent?

lol at this

he also invented RexKwonDo