Just to clarify, these are more regular classes with some focus on sword, rather than seminars. They are found as "extra's" on Hatsumi's "Ken Tachi Katana" DVD. Aside from that, I'm not going to comment on what is shown itself, as the last time someone did that it turned into a 16 page thread on another forum, and not with the best discussion. Suffice to say that there are a large number of things that Hatsumi Sensei is incredibly good at, but, understandably, it doesn't cross over to being good at everything.