Ninjutsu, the difference between Ninjutsu and karate really is that... There is a lot of overlap. In some respects, there's a lot of difference. It's not really a black and white type of answer that can be given, because you're talking about multiple layers of context and different martial arts schools and also the history and the age of those martial arts schools. We have elements of karate in Bujinkan training; maybe even karate schools around the world now have elements from the traditional schools that we have. So, it's not really a black and white type of answer that I can give on that. But, that's just a little bit about the difference between Ninjutsu and karate.