Takahashi chikuzan isn’t playing a tsugaru shamisen in this video…
it looks like minyou shamisen…
I am unsure, please look 
What a classic video, nice find.
It is dark, and I can’t see the entire Shamisen, so it’s hard to tell, but it kinda looks like my chuzao Shamisen. Chuzao is medium thick stem. … and indeed, I am learning Fujimoto-ryu which mostly does Minyo.
I also enjoyed his unique technique of bachi use, so cool. thank you for sharing!