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.
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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,