Hopefully you got an english version. The one i watched was in japanese. The techniques he shows in the vids are awesome but I wish I understood what he saying. I also recommend the Shinya Aoki Super grappling DVDs. I used some moves inspired by these guys to win a grappling match recently. (Failed flying armbar to Toe Hold)
It just got shipped. But there's a couple sections of it I know I like because I play a bit of flying triangles and spinning heel hooks sometimes.
Also, I have the Aoki one and I don't care if the Imanari one is in Japanese too because if you've grappled for a little bit you can just see and learn.
For those of you who haven't heard of this guy, here's a highlight.
he JUST fought at dream 17 i believe it was, his nickname is the MASTER OF LEGLOCKS just like AOKI is the MASTER OF THE FLYING SUBS
he does that flying dive to de la riva guard/anaconda guard position i was like THE WHAT? like 3 times in his match and he finally hit it i was very impressed