From reading about it on that link you gave, it sounds more like an extension or side note to their traditional ju jutsu training. Not so much a basis for an entire approach to JJ. Could be wrogn though. And I had never heard of that, which is why I asked the question.
Member of DaJoGen MMA school under Dave Hagen and Team Chaos fight team under Denver Mangiyatan and Chris Toquero, ran out of Zanshin Martial Arts in Salem Oregon: http://www.zanshinarts.org/Home.aspx