Interesting videos, and noticed they are Seido-kaikan as well.
Would have nice if the techniques were shown with slightly more real-fight based movement. But still interesting to watch.
I see the instructor is a Roku-dan. Any idea which dojo he is from? The only reason I ask is I never see to many 'high ranks' at the SoHonbu. I know Nakamoto Shihan & Kakuda Shihan are both Roku-dan, and Minatoya Shihan is a Go-dan. I also believe Tokoy Shibu-chou is a Go-dan, and the Akashi (Hyogo) Shibu-chou is also a Roku-dan. I have seen a handful of Ni-dans & San-dans. BUT the majority of yudansha I see in Seido-kaikan are Sho-dans.
Sorry to digress...!!! Nice post