Thanks for the info Andy! I figured if the KKW stated that there were 50-some 10th Dans, they weren't talking about folks that had given themselves the title. Anyone find out more about who these folks might be?
The KKW itself must have those records, no? They would keep track of that sort of thing---probably keep track of everyone whose belt rank they've certified---and I can't imagine it would be secret info or anything like that, eh?