I have some experience with Kempo and Goju Kai. My Kempo instructor was Ralph Castro and my Goju Kai instructor was Yamaguchi. Both are top instructors and neither would place a student in a situation that might cause physical harm. I would recommend either instructor. But remember that the systems are very different. Martial Arts are so widely varied and the instruction methods vary so widely that the potential student needs to really shop around and find an appropriate system and a compatible instructor.
