Its fake but I think is a very funny video!
Wooa I wanna a Shamisen hero for real!!!
yeah I would like that as a cell phone app although I am not familiar with playing games on the phone / touchscreen I would download that one . . . 
This link has been discussed before but I think I’ve come to a new conclusion. The future of these Hero-games should have a very long touchscreen set in the neck of the controller(instrument). That way it would be possible to make any type of musical instrument work, and even chords etc.