I did ninpo ninjitsu for three years and left somewhat dis illusioned with the art.I think the art is beautiful and has the capacity to be great but for one thing, sparring. We never tested our grappling skills in randori such as in judo, or our striking skills in free sparring. I understand that some of the techniques are to dangerous to be performed but a good solid randori and ground session would be envaluable tool for teaching students about real combat and how exhausting it can be. It would also improve students fitness and their capacity to deal with combat. I`m sure when ninjitsu was practised in the past it used to be on a sparring basis and has been watered down for western consumption, it is a great shame as i love the culture that goes with ninjitsu something that in my training (vale tudo) is not present.