Thanks for your time. I can tell you're very impressed with Dan. But I didn't ask about how powerful Dan is. I asked if he teaches his own system, or if he teaches someone else's system.
I was explaining what Dan teaches. The core comes from Daitoryu. Dan took the skills and used them in Judo, Jujitsu, and lots of MMA, grappling, etc.
As for what the name of the system is, it probably has some terrible Boston accent, so I wouldn't even try to type it