Everyone has really provded some food for thought. Speaking in private is certainly a good idea. Also, I did not consider that his rank may not be formal. He did train in Japan as a child and teenager so speaking with his instructor would not be realistic, nor would I do that anyway as it would be inappropriate. Yes, while his knowledge is more important thank rank, the rank itself holds some credence, especially to those who are interested in joining the dojo. So, when I tell someone about the school and I am asked what rank the owner/sensei is, people expect a succinct answer. Thank you to everyone who chimed in. You have been most helpful.