I haven’t had a chance to go through all the new videos, but I loved the female group in the first one, Suzune, and it was great to see that big convention performance with dozens of shamisen players of all ages.
An oldie but a goodie, the Yoshida Brothers performing Kodo:
That’s ok MMIX, take your time watching the videos, they are going to be here for a long time. The video’s you are posting are great! I’ve never seen some of those videos before. Keep it up 
Ninagawa Beni (蜷川べに) of Wagakki Band. 
A short piece performed by Sumie Kaneko for the Museum of Fine Arts, Boston (MA).
Perfect example of rokudan
Beni Ninagawa from Wagakki Band doing some cover…
And a pretty interesting cover of Senbonzakura, not only shamisen but nice
Another video by Hyakunen Yakou, this time with Yuuko Suzuhana, singer of Wagakki Band
Found this in another thread and thought it should be added here: